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 do not think strict rules are necessary in bounty campaigns. We should be rigorous in the number of participants and some way of decorating the title of the bounty campaign. It would be great if such a nice topic and there would be a lot of interested investors in learning about the project. You can refer to the datablockchain project and it is very well designed.