O2 vs Wikipedia - a quick look inside the minds of the folks who build the blockers.

[pseudomonas]

O2, in common with just about all mobile companies, has blocking. Unlike most, they helpfully provide a URL checker http://urlchecker.o2.co.uk/ where anyone can check if a URL is blocked. update: that page has been taken down "to ensure it's fit for purpose and provides transparent info to [O2's] customers".

There are three levels of blocking:

Open Access - what people who've asked for "no filtering at all" see.
Default Safety - what people who've signed up without expressing preferences see.
Parental Control - what people who've actively asked for a child-friendly device see.

Now, O2's Parental Control is a funny old thing. It allows http://www.mcdonalds.com but blocks http://www.childline.org. To be honest, it blocks most of the internet apart from a tiny number of mostly corporate sites. It allows amazon.co.uk but blocks amazon.com. We may never know why - this is all done by their unspecified third-party partner (rumour has it that this is probably Symantec).

Wikipedia seems to be an interesting case - it's allowed, but certain pages are blacklisted. This is all done very shoddily, if the URL checker is to be believed. So https://en.wikipedia.org/wiki/Penis is blocked but https://en.wikipedia.org/wiki/Penises is allowed, even though they both go to the same damn page¹ Also, they block Penis but fail to block Clitoris²

The choice of which pages to block on Wikipedia is interesting. A bit of playing around revealed that there wasn't much consistency; it looked like, rather than applying a classifier to every page, someone had made a list of a few pages with titles that seemed dodgy to them, and had called it a day. This seemed an ideal opportunity to find out what the spirit was behind the blocking, especially since they kindly tell us what the category of nastiness is.

Wikipedia has a nice list of the 5000 most visited pages. I ran them through the checker³ and made a list of the aberrations, sorted by category. Pages in more than one category will appear twice; if they're blocked in one and not in the other, they're still blocked to the user.

Page title	Category	Open Access	Default	Parental
Alcoholic_beverage	Alcohol	Allowed	Allowed	Blocked
Beer	Alcohol	Allowed	Allowed	Blocked
Bourbon_whiskey	Alcohol	Allowed	Allowed	Blocked
Brandy	Alcohol	Allowed	Allowed	Blocked
Scotch_whisky	Alcohol	Allowed	Allowed	Blocked
Vodka	Alcohol	Allowed	Allowed	Blocked
Whisky	Alcohol	Allowed	Allowed	Blocked
Gay	Lifestyles	Allowed	Allowed	Blocked
Lesbian	Lifestyles	Allowed	Allowed	Blocked
Transgender	Lifestyles	Allowed	Allowed	Blocked
Anal_sex	Mature Content	Allowed	Allowed	Blocked
Cunnilingus	Mature Content	Allowed	Allowed	Blocked
Fellatio	Mature Content	Allowed	Allowed	Blocked
G-Spot	Mature Content	Allowed	Allowed	Blocked
Human_sexual_activity	Mature Content	Allowed	Allowed	Blocked
Kama_Sutra	Mature Content	Allowed	Allowed	Blocked
Oral_sex	Mature Content	Allowed	Allowed	Blocked
Sadomasochism	Mature Content	Allowed	Allowed	Blocked
Sex_position	Mature Content	Allowed	Allowed	Blocked
Sexual_arousal	Mature Content	Allowed	Allowed	Blocked
Sexual_intercourse	Mature Content	Allowed	Allowed	Blocked
Tribadism	Mature Content	Allowed	Allowed	Blocked
Anal_sex	Sexual Advice	Allowed	Blocked	Blocked
Cunnilingus	Sexual Advice	Allowed	Blocked	Blocked
Fellatio	Sexual Advice	Allowed	Blocked	Blocked
G-Spot	Sexual Advice	Allowed	Blocked	Blocked
Human_sexual_activity	Sexual Advice	Allowed	Blocked	Blocked
Oral_sex	Sexual Advice	Allowed	Blocked	Blocked
Sadomasochism	Sexual Advice	Allowed	Blocked	Blocked
Sex_position	Sexual Advice	Allowed	Blocked	Blocked
Sexual_arousal	Sexual Advice	Allowed	Blocked	Blocked
Sexual_intercourse	Sexual Advice	Allowed	Blocked	Blocked
Tribadism	Sexual Advice	Allowed	Blocked	Blocked
Birth_control	Sexual Education	Allowed	Allowed	Blocked
Enema	Sexual Education	Allowed	Allowed	Blocked
Erection	Sexual Education	Allowed	Allowed	Blocked
Gonorrhea	Sexual Education	Allowed	Allowed	Blocked
Penis	Sexual Education	Allowed	Allowed	Blocked
Pubic_hair	Sexual Education	Allowed	Allowed	Blocked
Sexually_transmitted_disease	Sexual Education	Allowed	Allowed	Blocked
Vagina	Sexual Education	Allowed	Allowed	Blocked
Vulva	Sexual Education	Allowed	Allowed	Blocked
Suicide_methods	Suicide	Allowed	Blocked	Blocked

Notice that their "lifestyles" category has only three items within the top 5000 Wikipedia pages⁴. What these have in common is left as an exercise for the reader. Whether that falls foul of the Equality Act 2010 is left as an exercise for the reader who knows about English law.

Notice also that for instance the list does not include the following top-5000 pages: Asexuality, Celebrity_sex_tape, Child_pornography, Homosexuality, Human_sexuality, List_of_female_porn_stars, List_of_Masters_of_Sex_episodes, List_of_pornographic_actresses_by_decade, Masters_of_Sex, Pansexuality, Pornhub, Pornographic_film_actor, Pornographic_film, Pornography, Revenge_porn, Same-sex_marriage, Same-sex_marriage_in_the_United_States, Sex, Unsimulated_sex, YouPorn ... and that's just in the top 5000 out of 4 million. Anyone who thinks the filter is effective is going to be very disappointed. And those are just some of the sex-related pages - they make no attempt to block pages about war, death, torture, or other potentially distressing subjects. Again, speculation about the mindset behind this is left to the reader.

This all reflects very badly on O2; but I think we should assume that the other ISPs are every bit as incompetent, until they present us with evidence to the contrary.

If anyone would like to help me with a similar but more extensive project for TalkTalk, BT or Sky, has a line with one of those ISPs, a willingness to give me SSH access to something at your end (probably helps with that bit if you're a wee bit tech-y), and a preparedness to turn the dreaded filters on for a bit, please let me know in the comments.

I've been ranting about this at more length at pseudomonas

.

¹ Note as an aside that the URL checker claims to be able to tell the difference between the two httpS URLs. This is very worrying if it's true, but my suspicion is that it's not and the URL checker is just shoddily written and assuming they're plain http.
² Perhaps because they had problems finding it.
³ Actually, I misinterpreted how the URL checker dealt with encoding and ones with brackets, punctuation, apostrophes, and diacritics got skipped. Sorry.
⁴ Since you asked and to save you a click or two, "Bisexual" isn't in the top-5000 list of pages, but that Wikipedia page is indeed classified as "lifestyle".

Comments

[tarchannan]

Thanks, this is interesting. Good work.

[sunflowerinrain]

Excellent piece of work. Thank you. I contented (not really the correct term for how I felt) myself with a succinct, somewhat pejorative, and much less informative snarl on Facebook.

[atreic]

Gosh, that's all very interesting.

[kaberett]

Thanks lots for writing this up.

[sunflowerinrain]

I just followed a link to an article in New Statesman, and wondered if you have suddenly acquired a lot of followers on Twitter.

That article is a bit crude for sharing where my aunt and uptight cousins can see it, but it does make another, potentially useful, point about the option to have the filter active or not: that an abusive partner could block an adult's access to help sites. If this is so, my support for merely boycotting the filters is not sufficient.