I don''t think anything happens to it if you don't press it to hard otherwise it might break.
I am not sure
Yes. They screen may crack on contact or even internal damage is possible.
no its a game
Yes you can. It messes up the screen, and leaves finger prints. You can't put too much pressure on it, because it could break the screen. I'm using one right now too.
off break
It's certainly possible for it to do so. Though turbulence itself doesn't do any kind of "special" damage that I know of, any kind of jarring or something physically rough on the computer can damage it. Generally on a laptop (which I assume is what you would take on a plane) the screen is, indeed, the weakest link and most likely to break. They don't have a lot of reinforcement. If you take your computer with you I would suggest either keep it in its bag on your lap or on your tray table and hold on to it, or if you pack it overhead, wrap some leftover Styrofoam or rubber band a towel around it and don't pack anything in there with it that can stab it in the screen. Pressure in one small area like that can easily shatter a screen.
Break it.
No,because the stylus will break.
Water
a break is bad and if you hit your computure with a hammer you break it
You should probably give your computer a break for a little while, as in a few days, and if that doesn't work, try reassembling your computer. If that still doesn't work, you should probably contact your computer repair shop or retailer.