I used to work at a small grocery store in the poor part of town. We had one woman who came in multiple times per day at bought 7 lottery tickets each time (lucky 7), sometimes she would buy 3 sets of 7. I estimate that she wasted at least $50 day on lottery tickets and obviously never won more than $500 pot when I was there.
She was the worst case, but I wish I could say she was alone. We had many, many patrons that burned so much money on lottery tickets and cigarettes. Since that experience I have never had the urge to buy a lottery ticket or smoke a cigarette.