Ofcourse it is!
Nowadays, I notice most of bounties have strick rules, making bounties more organize and I like that Bounty Manager requesting Proof of Authentication to limit scammer .
It's been one of major mistakes of bounty hunter like me not to read rules and requirements of each bounties ending up not getting stakes so it's very important to read and understand each rules to ensure that we're doing the right thing and not wasting our time and effort.
I think one of the best rules the forum can make is to make it a permaban offense to require more than 8 posts per week for signature. We could cut the spam down significantly with this one move. Going after the money hunters is an obviously loosing proposition. If you go after the bounty managers who require all these spam posts you will have immediate results. By keeping signatures (getting rid of these would fix the problem almost immediately) and letting the bounty manager request 15+ posts a week you have to wonder if they really want the spam to stop.