I'm really hesitant to do KYC at first for I'm worried that they might use my details to scam others.I have done some KYC in my past bounties already only if I have a decent stakes but before doing KYC I made sure to research about the team and the developers of the project.And about airdrop KYC I haven't encountered an airdrop requiring kyc but if there is, I wont risk my identity specially if the project haven't established a name that could be trusted.