I've left during intermission, but never with actors on stage. While I can't imagine ever doing so, I suppose if I were highly offended, maybe I would -- but it would take a lot for ME to be that offended.
I think being 'bored' or simply disliking a show is not enough to leave while the show is being performed, but I could understand leaving if you are truly offended by the material.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.