I didn't get the impression that there was proposed any sort of prohibition on ideas that can be discussed. Rather, just perform a quick 'sanity check' against the criteria and make sure you're not needlessly alienating vast numbers of potential members of the community.

I don't think anyone is even going so far as advocating 'political correctness', and I laughed out loud at calling Alicorn a 'feminist' (reluctantly pushed into that role as she is).