These also demotivate genuine workers to leave the forum because their already dropping payout getting thinner because of these multi-users
Anyone who leaves the forum cause they did not get the expected amount they wanted from a bounty campaign, would not be missed that much.
Bounties and signatures are secondary on the forum, the primary purpose is Bitcoin discussion.
A special badge can be provided for bounty hunters. New members must pay 10$ to the forum to get that badge to join the campaign. Already existing members and users above full member will get that badge as an airdrop. It is easy to get member rank by buying merits but for full member rank, it won't be profitable. When an alt farmer gets red-flagged to 10 of his account he or she will think twice before doing the same because it will cost him money this time.
The admin has already stated that they would not get involved in managing bounties or helping to directly moderate their activities.
In the hypothetical situation that this idea was accepted, what would force the bounty managers to consider the badges when choosing participants for their campaigns.