Some airdrops asking for AML/KYC with airdrop estimated amount for less than $5. Will you sign up?
NO! For your own safety, don't give anyone about your personal information from your passport. Say it's airdrop or ICO, don't do that. Providing foreign id card, driving license, or bank statement is more than enough. Passport information is very sensitive, this could be used to illegal actions by scammers. Also, you should ask ICO publisher to destroy any KYC data taken.