This will never end. people are greedy and they will keep abusing bounties. I would like to request for disabling signatures of Jr members and full members.
And you think that would solve it? You don't even know if higher rank members are the ones behind those cheating accounts. What surprises me is that despite the amount of bounties they join and cheat their way through, they end with threads about how such bounty have turned into scam or threads about how to identify good the right bounty to join. What I think would solve it to a large extent is some rules in that section of the forum. To a large extent, the bitcoin section of the forum has been reduced with all of the cheating but the bounty section is very much infested. I think there is need to start keeping a list of managers whose campaign have abundance of cheaters and get them tagged. With that, they are forced to do some decent background check on the participants they are accepting.
Who would spend time on identifying those bad managers? I would first terminate my own managing service and then would start tagging those managers. I would stop my own managing business to avoid any conflict of interest. I shouldn't tag campaign managers if I'm a manager myself.