Remember to report problem content even if you get banned for it. The reports go to all relevant parties; the mods of the community, (who are going to be in bad faith and will likely laugh at your report) but more importantly the admins of both your and their instance. If the home instance does nothing it will signal to your instance that the admins are supporting that kind of behavior which can kick off diplomacy efforts.

The threat of defederation keeps instances accountable, as even a bad faith instance wants to retain their audience.