This is worst, I have seen lots of people are claiming the reward from blockchain.com with verifying their identity. I would rather die than giving my identity to anyone else, no matter how much the reward is.
The above examples are a bit exceptional, but even so, the risks of identity theft should outweigh the potential (low value) reward.
Airdrop hunters won't think about it that much. Let's just hope they realize the danger and the company can find a better alternative than requesting KYC from their users.
If the team itself is anonymous, giving them your KYC is insane imo. Sadly, a lot of people do that because they hope they'd get $1000 a year after.