Some airdrops require personal info from their users like government approved ID proof, a selfie with it, contact number, email, address etc. Does this information really required? How to know if somebody is scamming you for asking this kind of information?
Don't do the KYC on airdrop. Almost airdrop token is useless because it does't match with minimum trade required from exchange and you can see the token stay in your wallet like infinity. If you want to earn more, join bounty campaign and you will earn enough to trade.