This tip based only on my experience how find if the airdrop is fake

few months ago i encounter a fake airdrop using a telegram bot.
An airdrop bot pretending as a real airdrop of coin already listed on CMC
first i search on coinmarketcap from there i saw the legit site..
second i search the telegram group chat
and ask the admin there if its legit airdrop or not and they said its not legit an airdropbot using the name of their coin

another fake airdrop i see last month is bitair also asking for selfdrop to buy their token
i search the bitair website and i find it.i see the twitter account from there website
and i notice on there last post was november 2017 if im not mistaken,
and bit air ico sale was ended last november.

both of this type of airdrop scam i noticed they both collecting a member for their telegram channel and collecting follower on their twitter account.and asking for selfdrop

i hope this post can help some newbie to avoid to be a victim of airdrop with selfdrop

any other tip on checking if airdrop is legit?