Whatever social media you prefer (twitter,telegram,facebook) for example all have multiple groups on there announcing alerts for new airdrops as they see them.
I use crypto.airdrops on telegram the most, followed by a facebook group I can't remember the name of - but just type in airdrop into the search field and find one.
Basically they are all going to be offering much the same. A lot either send you to airdrops webpage directly, here for the announcement or to a googleform to complete. So basically if you want to save all the drama - just login here and check the Altcoin/Token announcement forum for new ones.
At least while you're here you can get a consensus of what people's initial feelings are before you jump on board with an airdrop that may/may not be sketchy.
Also - I like the Crypto.airdrops on telegram as they have decided to stop advertising sh*t airdrops from places that require you to send them something to secure your airdrop. Thats a f*cking joke right there and as bad as ones that ask for your private key. (Sorry for the little rant at the end there...)
Let me know if you find an awesome alert group though - I like airdrops! (the nice ones - not the scam/sh*t waste-of-time ones)