So I saw I was mentioned by an account called "holohoax" on poa.st, so I blocked that account. Went to check that instance. Calls itself an instance for shitposters, which is fine, this could just be a bigot making a spam account.

Open the owner's profile, pinned toot rebrands toot as "poast", says "this site has no political leaning", and the first thing is a boost from a user named "sandwigger".

That's a domain block if I've ever seen one.