No, let's not try to regex our selvesourselves out of every possible combination of words that might upset someone, somewhere, sometime.
If you see casesa case like this pop-up in the HNQ list, just visit the questionsquestion, flag the question for moderator attention and ask for the question to be removed from the HNQ list with your argument why that is needed.
That is much more effective then tweaking a regular expression to the point it doesn't allow anything.