Thanks for sharing this article. Discusses very important facts. I must say I have earned lot through airdrops. And every one in this industry have earned lot through various air drops. But true there are lot of scams and hacking attempts coming with a face of an air drop.

A Project which airdrops you with 700 tokens worth hundreds of USD with a single page landing page site.(Looks fishy)
No project details and no team no whitepaper (Looks fishy)
No social media links
If you were to open the site (Please do not trust such sites as they can have scripts running in the background)

Any one who consider the factors you have mentioned will be safe. Thanks again.