I'm kinda weird. If I'm on the internet and everyone's anonymous or the slur isn't directed at anyone in particular (or anyone I know), I tend to just glance over it and not even care. I'll even joke about it sometimes. But I'm also one of the most politically correct people I know. :\ If I'm in an unfamiliar situation or not alone with friends, I'll go out of my way to be as unoffensive as possible.
I do think society itself is getting a bit too politically correct, but I'll take that over hatred and bigotry coming from everywhere. I wish it were easier to walk a middle ground, though. I have no problem with words or language evolving to mean something different from its original meaning. Like I'm pretty okay with people saying "this is gay" and meaning the situation sucks, but everyone sort of has to accept the new meaning and so long as people get offended by things like that (and I can understand why they do, not putting anyone down over it [see what I mean about my political correctness? D:]), there will be a section of the population that feels the need for political correctness.