I see something different actually. Not that PC isn't getting out of control. But that no one who is acting with PC on their mind, actually think of it as PC. Everyone now a days seems to be against PC. But to that degree those who act in a way to promote a venue for political correctness, usually also say they are against PC, and don't recoginize that they are promoting a political correctness stent not long ago.
To me I see plight against "Political correctness" as simular as the search for "open mindedness." It's simular because those who accuse other of not being open seem to only apply the term to mean agree with that person, while at the same time being largely unopened to opposing views themself. Thus making the term void of what it should mean, and being a label to justify one's view, no matter what the view is. PC is on the opposite spectrum of the same dynamic. When a person says another is being PC, they're vilifying the other's stance to be oppressive against their view, regardless whether it was or wasn't. Regardless even if the person who is against PC thinks it's justified and not PC in other instances. In the instances that favor their own perspectives.
To me I see the term PC as more of a fraud then anything else. At least based on the context that it's usually used in. Sorry, just my honest (possibly blunt) opinion.