If you hit the "block" button on any user's comment, it doesn't just hide their comments. It basically acts like they don't exist. You don't even see "hidden due to blocked account" or anything like that which would otherwise indicate you've made that choice. They're just not there. The only way you can even see their content beyond that point is by manually typing in their account name.

And that's probably the best way to deal with people like those. Can't keep spoofing your IP like you used to be able to on anonymous imageboards to annoy every genuine user. Have to make a brand new account from scratch, which is often hidden anyway. Just let these people spend 18 hours a day every single day screaming into a digital void from which no-one will ever read their comments. Once they realize no-one gives a fuck about them, they'll leave.