I think most of the people and also the ICO believe that bounty is main reason for the dump of the coin.
did you know that budget for bounty was mostly not more than 2% of total supply? so how did a mere 2% affect the whole price of a token
?1) KYC
it's a good way to minimize people spamming bounty program by using multiple account but many will say no to this because they choose to stay anonymous.
2) content should be checked nicely.
3) Facebook and Twitter accounts should be checked if they have real people or not.
as for this it's hunter responsibility to choose a competent bounty manager. because bounty manager was the one who allocate the stake and manage hunter submision that join their bounty program.