Let the hive mind of Engadget get that for you.
"We need a digital camera that can be switched on and fire off that first shot fast. It's not a commonly tracked statistic on any review site, and nobody seems to have this information for every camera. We were hoping other readers could inform us as to what small digital cameras can fire off their first pics in under a second (ideally under half a second). It needs to be small, but mostly, just really quick in operation. Thanks!"
I think that its a good idea. Lifting these bans would annoy some people who are just anti-cellphone, but how many people in this world have cellphones, very many. When your on a solo flight and there's no one to talk to, hey call a friend, and what about buisness calls, WHAT ABOUT EMERGENCIES? Come on people, stop being so over sensitive, its just a cell phone! And most of the time when your bored what do YOU do, call someone.