Depends on the project.

I don't think any airdrop will ever be worth a KYC. And then there are social media tasks you're doing to promote projects you know nothing about. That's also a grey area.

For me, airdrops should be about increasing adoption of a project's applications.

You should check out Vite. Gives out free daily airdrop on the mobile app (the app wallet is one of the best in the market). No KYC or any tasks till now. Its a project with a huge upside and a DEX launching any day now.