Doing KYC verification is removing the essence of decentralized in the cryptocurrency. I can not able to understand why they need a KYC for a bounty or airdrop. Well, some of ICO required a KYC verification for security purpose. But Personally, It is a sign of inapplicable the team about security.
True, if they want to regulate the participants and to avoid spammers there are a lot of ways to do that. Specially if a campaign plans on having a KYC to recieve their bounty rewards then they should have put the rule in the first place instead of surprising the participants at the end of the campaign that would've not join in the bounty if they knew there will be a KYC requirement.