So there's high quality and low-quality airdrop? I thought that it's just about legit and scam airdrops. What specific forum you are thinking of being involved in these airdrops? there's no need to set up a telegram group because later on there's a tendency that it will also become a group for marketing.
If you find some airdrop which you are doubting of, start to ask people here and we'll reply to you what we think about that airdrop that you are interested in.