Is PC too oppressive?

This isn’t a pro-Apple manifesto—I would write just the opposite for that, especially in regards to publishing, but the question in the title means something entirely different than Apple’s present domination of the tech world. What I’m asking is if “political correctness” has been carried too far in general, and whether it inhibits creativity for fiction writers in particular.

Here’s an example that caught my attention: One day last week I saw an announcement for the NY subway system that ur...