When I tell members to refrain from dismissively referring to "PC" I'm not kidding. Again:

Per The Newbie Guide To Absolute Write.

Particularly this part:

Quote Originally Posted by MacAllister View Post
The complexity and diversity in our backgrounds can be much more difficult to face and deal with, honestly, when things are couched in terms of "gosh, it was all just in good fun" because of the built-in refusal to examine underlying attitudes of exclusion, or "I'm normal and you're not" -- which by extension implies that anyone who insists on examining exactly that is humorless and "PC."

Which reminds me -- accusing each other of "being PC" when you disagree really isn't cool. And what it usually boils down to is that someone is being a jerk or a bigot -- maybe inadvertently, maybe not -- and gets called on it which makes that person defensive.