Come on people, why let anyone on aircraft, and what about the cargo... get rid of both and there go all your supposed hazards... planes can now fly safely everywhere...
Mostly it's like the "turn your mobile phone off in hospitals" rubbish, recently admitted that it was unnecessary just cya, now there's been some tests it seems it's rubbish... now you electronics may get fried by stuff in hospitals (MRI, X-Ray machines etc) but your phone does zip to them...