Bots aren't my concern, as you're never going to get rid of them. What I'm after is being able to block any and all mostr bridges. I can't tell you how many times I've searched hashtag x and only get overwhelmed with results from the fediverse via the mostr bridge. I don't care what the fediverse thinks because I'm searching on nostr, and if I did want to know I'd just search Mastodon.
feel it, too. unfortunately it's so very easy to drop everything into the Nostr, and currently there's no nip for quality assurance of whatever kind...