Yes, I am familiar with the history of the term.

When it became a semi-ironic reference to overly-stringent (sometimes to the point of absurdity) restrictions on language use, however, a backlash developed, so now when someone objects to offensive language, they're frequently accused of being "politically correct." As in, it's "PC" to object to racial and sexist epithets.

Which is kind of what I was alluding to with my tongue-in-cheek LJ cut which you seem to be taking so very seriously.