It'd be nice to have anything Mostr and anything Bitcon-related filtered out.

Then read the like 3 of 4 posts that remain.

Yeah, no one needs to see that shit

If a client uses nostr.band for its searches then no. Sadly nostr.band indexes mostr.pub which poisons any attempt to search. If it doesn't then searches are probably based only on what relays you are using. Beyond that, I have no clue.