If you fail to gambling and you can not pay the loan it was a nightmare. I do not recommend .
yeah this possibility is always there, so never give loans to the gambler,
even though it was my friend
never say never, one day there is a time we should lend them money whatever the reason,
even for gamble and even it is someone who we don't know.
borrowing money for gamble is bad but not always.
I think you way of thinking is not correct. We all know gamblers will ask money for gambling means they might have already lost their money in hand in gambling so they are desperate to win back that lost money from gambling itself but there are not in a position to think if they lose again what happens. If they lose again then they will be in deep trouble so if lender knows it for gambling then better don't give them and save them from trouble.