 There's Queen, and that's another one bites the dust. Let's take a look at a couple more unspoken rules of air travel. I mean, can you laugh loudly while watching a movie? 58% say no. Chuckles are okay, but keep the guffaws to a minimum. What about hanging your long hair over the back of your seat? Yeah, most people say don't do that, but 26% think it's okay. And finally, flying with a baby? Get a load of this. One in four wish it wasn't allowed.