I, too, think the vast powers of Ignore are sadly ignored.
If you don't like what someone says or the topic of a thread, then just ignore it. You don't need to get the flame on, hackles raised, or even bother with muting. Just move alone folks, nothing to see here. The internet is big; maybe, just maybe, there's something else somewhere to look at that is more amusing or fits your style a bit more.
And if you really, really, need to change someone's behaviour, then you're move likely to do it by having zero replies on the offending thread or comment than start a tit-for-tat pissing match.