It's pointless here since most of the users are anonymous or pseudonymous, unlike in real life loan sharks where the lender know where they can find you and your personal information (not actually sure about this since I am not borrowing any money from anyone) but if you do it in the forum you'll just making yourself a fool since they can just vanished without a trace, but if you are thinking about previous borrowers that already build trust. Also, you wouldn't be able to borrow money easily as you at least need to have previous successful transactions before or at least have a collateral.