I seem to find wallets all the time while riding. I look through them and if I can find an ID with an address I try and return it right then otherwise its back to my apartment for a google search. People are surprisingly rude when I return the wallets though. The most recent time I tried to be a good Samaritan and return a wallet with all the cash and credit cards intact I was accused of stealing it. Why can't people just be happy they are getting their property back?