This guy is definitely worng for oh so many reasons!

I once found a little girl's plastic purse while walking along the park (on the Potomac). Knowing that the park police would be too busy for something so minor and that the parents might not have the time to come back and look for it, I managed to track down the possible owner and phoned her to ask where it should be returned. There were a few little items that might be precious to a little girl but otherwise it was empty. I asked the mother's permission and filled it with lollipops and other candy that we keep in the office for our cravings.
I didn't hear back from the mother but I can picture the little girl getting her purse back and finding it filled with candy.
That is more rewarding than anything monitary that I can think of.