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.
KYC which is patterned from banking institution is created to protect its investors. The objective of this security protocol is good. But what I observed this is being exploited by some crypto project to collect information from its investors. I really wish that this method of identification and requirements would really serves its purpose.