I just block the obnoxious users as they show up. Already got the most prolific posters; now I just see the occasional comment on posts outside of that instance. Maybe 2 of them haven't been annoying and haven't been blocked.

On Lemmy? No, though that is in the pipeline.

Kbin allows you to block entire instances though, if you're not averse to making a new account on a different instance.

I thought yall were freeze peach absolutists?

I think if you are active in communities related to news and politics you're going to see political and news related posts. It's kind of a part of the deal.