The Ignore function is not for just cutting out people who disagree with you. It's for cutting out people whom you feel add nothing but negative tones to the forum. There are and have been people throughout ENWorld's history, (not just a couple of recent OTTers), who do nothing but argue and antagonize everyone or one person, (sometimes rotating between people). Everyone knows the type, so I shouldn't need to explain it. Often such people get kicked out/banned, but sometimes they manage to walk the fine line, or maybe they just annoy the crap out of you/me/few people. The Ignore function gives you/me/few people the ability to just shut off their noise so it doesn't annoy you. I don't put someone on my Ignore list until/unless they have proven themselves to be one of those with no redeeming quality for discussions. It's a judgement call for each individual person.
For me, so far, every once in a while I see one of my Ignored people quoted in someone else's post. When I see that Ignored person's comments, it usually confirms my decision to use the Ignore list.
Bullgrit