I've seen a number of accounts that seem to harp on a single topic, grow increasingly adversarial if you dispute or refute anything posted, and eventually just start screaming insults until you block them.

This feels like very old-school early '10s era Reddit, where the Admins don't do more than the high level stuff to keep the site operational, the Mods are as overworked as they are short-tempered, and a handful of power users dictate the content of any given channel by spamming it with whatever media supports their personal grudges.