This "Ignore user" button is already proving very useful for me
The only problem is that when you ignore user X, you still see user X's posts when someone quotes user X (like you see your post quoted in this post of mine).
Apart from that, it's really good, instead of a post, there's only an almost invisble notification saying something like "You have chosen to ignore the posts of user X".
I'm really hoping you'll be around a little come the Olympics, I've always very much appreciated your invaluable knowledge on Iranian sports (especially weightlifting and wrestling).