I'm with Moshe, I too have been burned many times. I think that in my line of reasoning tho it is a sadness not over my loss but by the fact that they didn't learn and help themselves after I helped them. It can be very depressing.
I would have done the same thing in the McDonalds..but sadly I wouldn't have given them a place to live in my house..
I wish it didn't have to be like that.
Someone gave the suggestion one time to make a few little packets to keep in the car, possibly with a sandwich ( P&J) and a bottle of water..with maybe a address and phone number of a local shelter or charity that may be able to provide housing or food to give them..
I forget what else, it was a good plan I wished I had saved it.
Snoozy