Look. It's simple. If everyone that brings one of those to the parks could use self-control and not impact any other guests while using them, then I would have zero problem with them. Unfortunately, we have seen, even by the few people on this thread, that is not going to happen. People are sticking them up in rides, at restaurants, during parades and fireworks, and being inconsiderate of other people. Since it is impacting others, and could be a definite safety issue, I would rather Disney error on the side of safety, and ban them from the parks. JMHO.