I pay a DD to my local hospice, they are great, just send me a monthly email to give me the latest news and have never asked me to increase my donation. Have been donating for a few years.
The worst one ever was when I had just gone on maternity leave and we were skint, had popped into Pets At Home and they had chuggers set up in the doorway with a stall. Got into the shop ok but it was getting out that was the problem. There were 2 of them and they virtually blocked the door to stop me leaving to do the hard sell.
My god, she was persistant and wouldnt let me leave without signing up, but unfortuately for her I am a stubborn miserable boot so she didnt get a penny or a DD out of me. I just wonder how many other people signed up just to get away.
The charity was one that my work supported and i had contributed to it during the fund raising but it was a charity i wouldnt support myself.