What I find interesting about these things is that if someone just vaguely and politely asks for donations face to face, it's really hard for me to decline, even if I kind of want to--that is, I'm much more likely to donate. But the instant they start getting pushy and obnoxious, bringing it up repeatedly, telling me I "can't" leave until I donate--that's when I dig in my heels and think, I am never giving you a cent, maybe not for anything, ever. Maybe this is just my stubborn personality. But they would have so much more success with me if they used a lighter touch, even if objectively, I didn't really want to donate. But them getting rude about it gives me the perfect excuse to say no, when otherwise I might have said yes.