After thinking about my piece yesterday, I'm now of the opinion that while there are many different strains of PC, it is up to each of us to choose the strains we wish to associate with. If one is caught associating with a strain one dislikes, than it is often to one's preference to have it to work to have it changed.
The question then is whether avoiding the imposition of your vision PC on another decreases the likelihood that their PC will be imposed on you. I am skeptical of this idea - actually I think imposing your political correctness on another might be the best way to get them to back of their vision of PC that you dislike. Of course this philosophy, if adopted, could lead to multiple actors competing to up the magnitude of their PC on the other in order to get each to back off, which would make our society a less pleasurable place to live.