If it is, you should be able to add servers to the blocklist in account settings. If you are using an app or client which doesn't implement instance blocking, you may have to do this in the webUI In a browser, but once you do the block will work in any client.
I swear, we need instance tagging so that people can tag their instances as “right-leaning”, “left-leaning”, or “moderate” and let users just pre-emptively block wide swaths of the fediverse for themselves.
The worst thing you can do is block people because of their leanings. That is how you get echo chambers. Of course many extremeists on both sides need to be blocked, just make sure you block them on your side too.
Lol yeah, I have to block individual hexbear users whenever I find a thread where the instance hasn't defederated from them yet. I'd love to be able to block all hexbear and lemmy.ml users
Language would be a great option, too. I find all the non-English posts interesting in a puzzle sort of way, but honestly I don't need them.
I find my process for tailoring Lemmy to be the opposite of mine for Reddit. Reddit, I compiled a list of communities I was actively interested in and avoided /all entirely. Here, I'm always on All, and would rather just narrow down what "all" means.