I can't believe people would stoop that low. That's awful selling the stuff on after you've been kind enough to try and help them out. That's almost as bad as some of the professional beggars I sometimes see in the town centre. One woman sits on a piece of cardboard with a hungry and homeless sign and takes money off passers by. One day, I was sat at the bus station on my bus, I saw her go into the toilets quiet smartly dressed. Ten minutes later she came out wearing tatty, dirty old clothes with her begging sign round her neck. Plus, I've dropped her off a few times at night and I can tell you, she lives in a very nice area of Manchester.
It really does get to you though, when you think your helping someone out, that's genuinely in need and that's how they repay you

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It is a bloody shame what this world has come to,
That is all i can say, on this subject. But i will add one more thing... When i was training as a social worker, a fellow student thought it would be good to buy a beggar (sat outside) greggs, sorry lisa "pie shop" a soda and a sandwich.
This gesture lead to the beggar throwing the sandwich,back in her face with the comment F**c*off i want money not food.
What a lovely world we live in EH.