Who said bounty hunters are guilty? Bounty hunters are not lowering any rate at all, if anything, they are generating additional exposure for the ICO so that ICOs are likelier to succeed. Besides, if giving out bounties were not profitable, ICOs wouldn't be offering them in the first place.
I think what OP was alluding to was the fact that bounty hunters feel like they are under constant prosecution here at the forums. Whether that be from big ranking members who hate the thought of bounty or whether that be from ICOs calling for KYC on some projects. It just seems that this aspect of the forum isn't wanted, which is weird because they offer it. Kind of a catch 22 you can't win whatever side you are on.