@MicroWave
Yes, when your server is getting swarmed in spam, you first fediblock (or at least limit, when limit is supported like on mastodon).

Then you ask the admin of the instance what’s going on. You can also help them clean up the bots.

Then you can federate again once you’re 100% sure the bots are gone.

When the number of bots is high compared to the number of users, that’s even more reasons to block fast