It may be regrettable that the Airdrop project requires KYC verification. Maybe many people don't like it because the results are very few and also have a big risk. For me, KYC is not a problem, if it is really needed and as long as the project I follow has good potential. For me, it is not a problem to pass KYC verification.
It really becomes a big problem and suspicious when it is coming via airdrop, airdrop is meant to be a fee distribution of their token which does not require any form of investment to come in as fund.
I will treat any airdrop that ask for my KYC as strictly spam that want to get my details to be able to scam me either now or in near future, but for the real projects, I know they can request for KYC because they need to also verify whoever is bringing in money into their system since we do have a lot of large investors and whatever rule they create for the system must surely affect all users since they wouldnt know in the first place whether a user is coming in with big fund or not.