In this post, I talked about how calling someone "crazy" - even if good-natured in intent - is dismissive and derogatory. In similar conversations about other words ("retarded", "gay", etc.), it's common to see comments in the vein of, "Now I'm not allowed to say [crazy/retarded/gay/etc.]!? Censorship! Political correctness police! Newspeak!"
I have not had any such comments here, but they came to mind, as I've found that taking "crazy" out of my vocabulary has resulted in me expressing myself better. Because now instead of just saying "that's crazy!" I have to put more thought into my intended meaning. Instead of "crazy", "nuts", "insane"; it's "unpredictable", "out of control", "incomprehensible", "irrational", "illogical", it "doesn't make sense". I have to be more precise in my language. And I avoid simply dismissing an idea or person - saying something is "irrational requires justification; saying something "doesn't make sense" invites explanation.
Contrary to what those opposed to "political correctness" think, avoiding dismissive slurs improves discourse for everyone.