Good for you Insomniac. I know that some of that get paid (this was discussed on here by the great HangSeng who, at the time, seemed strangely familiar). I avoid them like the plague, the secret being to quicken your pace, look purposeful and never, ever make eye contact!
Before anyone jumps on Grumpy old Sylvester, I do give to charity in other ways and on my own terms!