In Las Vegas I see beggars every time I go out. I keep cheese & crackers (the kind wrapped in cellophane) in my car to give them. I might give them a dollar or some change as well. I did see one beggar (from a parking lot) stop on the sidewalk, open his wallet and count his money. He was loaded!
I can't allow a few impostors keep me from helping someone who appears to be in dire need. A lot of them have really bad teeth, I've noticed.
Some years ago, Barbara Walters said it could save your life or well-being to give handouts. I keep that in mind, too.