The live events are more interactive for the fans. With TV, you have the cameras there, commercial breaks where the fans can tell there's a down moment. At the live events, it's non-stop. We get to play with the audience; the crowd gets to get involved a little more. It's a very intimate feel.
Here's the acid test for appropriateness: Pretend that someone near and dear to you is witnessing what you are writing or sending, or knows what you are thinking about sending. If, say, your partner saw this behavior, how would he or she feel? That you are asking yourself this question could mean that you shouldn't be doing it!