The title of this thread is bit provocative, but the fact is that most people have a bad experience with airdrops. According to several airdrop hunters I spoke to, the majority ICOs don't pay out at all.
What's your experience with airdrops? Did you get scammed most of the times?
Not all of them are but 99% of projects that don't have a proper website, whitepaper, or team profiles yet alone a decent rating and review predominantly are
If you only apply for the top quality ones you'll find most of them aren't a waste of time and you'll be less exposed with a reputable project if it requires KYC or any personal information