"...AppLee commented that he has never gone into flight mode by mistake."
To me it happened numerous times. Many times during calls I accidentally triggered flight mode with my ear. I figured it happened cause of proximity sensor not working, sometimes the phone boots and the sensor don't works. But even with working proximity sensor I happened to accidentally trigger flight mode (I'm more clumsy with my disability). It would be nice, if flight mode toggle (from the notification bar) would ask before turning on. But it is not critical. 😉