I will once in a while......but I've had too many bad experiences with very bad people that have tainted my opinion. I am all for donating and food drives, but handouts are a completely different story.
I went to a Dunkin Donuts in the train station one more with a co-worker once and this kid, carrying a cup of coffee, came up to us, and asked us for some money so he could buy a donut. My co-worker freaked out on him and said "Oh yeah? Where did you get that giant coffee? Why didn't you use your brain and get a smaller coffee so you could get yourself a donut? No...we're not giving you ****" He wasn't happy and started to argue with her about whether or not it was her business what size his coffee was.
Another time, while riding the subway home, a guy was begging through the station. He walked from end to end, saying "I'm hungry, I'm homless, please help me, I haven't eaten in 3 days" over and over again. The night before, he was at this stop and used this same line and someone gave him a whole bag of pretzels (so I know he's eaten recently!), but what's special about this guy, is what he says to you when you ignore him or give him money instead of food. If you ignore him, he will call you just about any godawful name he can think of or say that he hopes something very disgusting happens to you. If you give him money, he will FREAK OUT and yell at you that that was NOT what he asked you for....but then keep the money.
This specific time, everyone on the platform was groaning when he showed up and this must have made him angry, because when he got on the (jam-packed) train and started his BS, he REALLY lashed out on people.
I was standing shoulder-to-throat with just about everyone, and he came to me and asked for food, when I said no, he asked the girl next to me, when she said no, he walked halfway around us, put his head between ours, and with his mouth right next to both of our ears, and shouted "I F***** HATE F****WHITE B*****"
The entire train just started screaming at him and pushed him off. He was there every single night that week, but I haven't seen him since.