There was an article recently about how a lot of the major charities pull this shit. http://www.theguardian.com/business/2015/jul/11/the-life-of-the-charity-cold-caller

Including a cancer charity who told a woman with cancer that having active cancer was no excuse not to donate, because she more than anyone should know how important cancer charity's work was!

I used to support Amnesty, but after they upset SO that badly, I don't see myself EVER donating to them again for the rest of my life.