This is going on from ages. It happened to me thrice till date. Once it was a teenage kid. I really felt pity and helped him. Second time it was some arabic speaking guy in a nice car. I thought fishy so I just moved on. Third time some one walked to my car as I was putting groceries inside the car. He looked really desperate so I helped him.
I helped twice but then I came to know this is just fraud. These fraudsters are playing with peoples feelings.
Its better to help people who are more needy.