I've said it before (on KF, I think), I'll say it again. Putting people on ignore disrupts the natural order of the forum. I've been dealing with Internet forums for decades, and the sheer amount of confusion, disruptive "LA LA LA CAN'T HEAR YOU" posts, and other such bullshit arising from users putting other users on ignore is way worse than simply passing over an annoying user's posts. If they're so insidious that you can't escape them, then either the jannies aren't doing their jobs or you need to accept that this isn't the place for you and move on.