For the newer people on Farcaster:

These types of replies aren't useful. Better to use a like than a reply.

I get that 1) people are excited / trying to be friendly and 2) not everyone's first language is English. However, low effort replies will eventually start to hurt your account's visibility on Farcaster.

They're bots. Lens is very similar, it's people chasing for airdrops, believing their dummy comments will bring them up the board should you release a token. If you want to fix this, implement some sybil-resistance features. The higher the sybil score, the lower your reach. My 2 cents.