Unfortunately the ignore list tends to make a bigger mess than the verbose posters, IMHO. Works okay for a infrequent poster or someone harassing you but for some of our more prolific, it leaves entry after entry of "You are ignoring this user. Show me the post."
It also does not address the visibility in the Recent Posts frame which also will be over run by certain conversations of certain members.
Many news sites use a gate limiting to one post per topic in so many minutes. JIMHO, that would be useful.
That's just me, I find looking at a blocked message more tedious than laughing at the ad nauseum repeat.