The following are some of the easiest way to figure out a scam airdrop
1. They will ask you to donate
2. They will ask for your private key
Feel free to add yours in case there are many more.
Best regards and happy airdrop chase.
a scam airdrop always give your a simple information about this project in their thread without roadmap and whitepaper
they also require you to donate before you can participate in their airdrop program