No, it's silly. They want you to do silly thing and take advantage of you just because of 10 or 20 bucks which worth nothing after ICO
Maybe many people do that but when they say "Hey just come and write fake complements for us all over social medias, say Hi in Telegram, etc", that's not right. You help them shillling. And as long as people do that and help them, more ICOs with more fake airdrops will come