Not quite - the ignore user feature here only prevents you from getting notifications about a user you have blocked. So you don’t see when they mention you, reply to or link to threads you’ve started, like one of your posts, etc…
What I (and I think @anon15383236) are thinking of is a feature that does all that and also hides all posts from a blocked user. So instead of seeing the content of a post you’d instead see “Blocked user - click to expand.” And clicking on that little sentence would show the full text of the blocked user’s post.
It doesn’t completely hide the presence of the other user, like blocking on some other sites does, but it minimizes it as much as possible. And because it’s not invisible and seamless it doesn’t break the flow of conversation the way that some user’s fear it would.
Edit: It’s the difference between watching a version of CNN where Wolf Blitzer has been edited out, and seeing a blank screen that says “Blocked newscaster on air: turn to channel 37 to watch anyways.”
