There’s a lot of bots in nostr. Actually it’s almost impossible to remove spam given the structure of nostr being truly decentralized. It’s his Achilles heel.

The WoT settings has cleaned up pretty much any spam I used to see. As for spotting bots that's up to each person to use some intuition Anything that is as useful (and threatening to the powers that shouldn't be) is going to be attacked with spam and bots. Its a dance that's ever evolving, but where there's a will there's a way when it comes to decentralized free communication