Well, here it is. Wonder if you can retro-imagine what I was replying to

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Any internal flight I've done within Egypt, once below maybe 10,000ft half the people on board are on their phones. One minute nothing, then the next as you're on final-approach, and a signal comes in range, 5 then 10 then 20 ring-tones going off. Little heed paid to 'switch off your mobile for the duration of the flight, until you're safely back in the terminal building'.
It is, quite unexpected, and disconcerting. But I haven't heard of it bringing down a plane there, or anywhere else for that matter.
Maybe it's a one of those things. The act itself is not a danger, however it is perceived to be. So by extrapolation the act is potentially dangerous via belief/common perception, but not fact.
Like smoking on a petrol station forecourt; what, the whole place is supposedly going to go up like Nagasaki? Ok, but where has this evvvvver happened before?