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.
I think kyc is also good on airdrops because through the used of it you may know the true identity of the bounty hunter and it will also helps us to used multiple accounts.