I don't participate in airdrops except for major bitcoin airdrops (forks) like bitcoin cash and bitcoin gold. Most airdrops require participants to provide their personal information and I don't feel comfortable giving my info away for a few altcoins.
I'm not also comfortable putting my info on suh spreadsheet. I tried to sign up before with one airdrop, I wasnt really interested with it but just giving a try.
You know what happened next? I have received another email from another ICO that is inviting me for their airdrop so I stopped.
I agree with you guys because of people private information(ID, Driver license, Utility bill etc) which was said to be sold on dark site and the new project are to blame for it. Therefore, I will advice you guys to do bounty campaign than the airdrop which you will only earn the maximum of $10 .