User level community and instance blocks will stop you from seeing posts from those places, but it does not block their users or their comments, so you’d still be able to see them around in non-blocked communities.
You can also establish a user block though too, so if their comments in unblocked communities are making your experience less than ideal, just block that user.
Lemmy doesn’t truly block stuff and the devs refuse to fix that
Really? Huh, I have a decent amount of communities blocked and I’ve never seen a single post from anyone of them after implementing the block
User level community and instance blocks will stop you from seeing posts from those places, but it does not block their users or their comments, so you’d still be able to see them around in non-blocked communities.
You can also establish a user block though too, so if their comments in unblocked communities are making your experience less than ideal, just block that user.