Yeah, Mastodon has separate block and mute functions. Somebody just accused me of "playing the underdog card" for saying that babies should have their heads attached to their necks, in a whole long chain of comments where he frequently mischaracterized my points, so yes, I blocked him.
If you actually believe this, you're a bit shortsighted. This is the fediverse, people can just jump onto a different instance. And even on Reddit multiple accounts for the same person were allowed.
well, multiple reddit accounts to get around a block or ban were specifically forbidden, but you're right, it's possible.
the thing you're still confused about is thinking that it's something everybody does the second they get banned. There is a limit to the amount of work people actually end up doing to troll others on the internet. Some trolls have an iron will and are stubborn to no end; the vast majority will lose steam eventually and just go do something else.
If you set up your own instance just to troll people more effectively, and somehow manage to stay federated with your victims' servers, you might just be a corner case.