I think scammers in bounties should be given a negative trust or should be bound from joining bounties. This process will help reduce the rate of scam because most managers do not accept participant with negative trust in their campaign.
this method is already implemented but the number of scammers and other illegal activites are still growing because giving them a negative trust is i think not really enough dueto the fact that they can still always create a new account in order to start scamming again. there is also a problem from most bounty campaigns because they still accept members with negative trust .
Much better if theymos will reuquire a phone number or email verification before signing up an account , so that they cant just easily create an account for fraud activities.