I don't think KYC for airdrops offered is fair for those who joined. Some ICO with airdropping is not also fine to get KYC for tokens worth almost nothing or a burger meal is not really fine. I observed it in some ICOs with airdrops that even with giveaways like that so small needs KYC? Don't fall for it guys, not worth it.
Most of the times, you submit KYC for nothing because they didn't pay in the end, they just need your kyc for their own good, maybe they will use it to scam other people using your information, so be careful