ok so, i dont think this is PERFECT idea, but i think i found solution about fake bounty claims. (fake bounty claims = when one person who has bounty on, lets someone kill him, and splits money).
basically, after for example i set bounty on ,,MrTurtleGamer". after someone kills him, i will get left a message by the game, which i can view from /bounty list all menu, this message will show me who killed ,,MrTurtleGamer". and if i approve it, the bounty money will be sent to him. this is to avoid any fake bounties. this is prob only solution i could think of ATM. and i dont really see any downsides for it, except u will probably have to wait to get bounty reward after kill. but bounty reward isnt main economy of anyone, so it will be fine (maybe). OR if person who sets bounty is FINE with fake claiming, he can set it up in settings too.
Approval Bounty Reward Claim - ON/OFF