You are evidently missing some points I mentioned since you keep hammering on the same nail.
I am for (regularly updated) regulations, and their strict application, even if it annoys passengers and their constant quest for comfort and entertainment. Loud and clear ?
Eventhough I am a radio-man by hobby and by profession, I am going as far as considering totally improper the usage of cellphones by pilots themselves, eventhough I know that the risk is extremely close to 0 and that they take full (ir)responsibility.
And yes, I also worked in the airline industry and I flew my share in cockpits, so I know how much cellphones (even personal sat-phones) are common on the flight deck, I even had a pilot friend who remotely and conveniently triggered his house central heating with a 5W VHF handheld while on approach.
But I do not concur with a devil's advocate brandishing the skull and bones about something which nobody else sees as a real danger.
(the post is about GPS receivers onboard an airliner !)
I know that the aircraft manufacturer does not make the regulations, but do not tell me that if a company like Boeing had determined that (non-intentionally radiating) PED's were a safety threat, the regulator would have taken it immediately into account, the manufacturer would have warned the operators about it, the operators would ban the usage and would enforce strict measures to avoid them being used.
I think we will see Aircells soon, and I consider this as a positive move in terms of safety. Why ?? Because it will reduce the inadvertent use of phones (i.e. inadvertently switched ON
Passengers will be aware that they will be allowed to use their phones when authorized (eg. we might see "cellphone" signs lighting up when the "seatbelts" signs go off), it is likely that pax will check their phone status when the appropriate announcement will be made over the PA, and that the cabin crew will be more attentive to enforce the rules.
Picocells will only be active during cruise (thus at altitude) and cellphones will transmit with minimal power level (100mW). I do not know if it will be implemented, but in case of failure of the onboard cell base station it is technically very simple to prevent the cellphones going in search mode at full power.
BTW, it is impossible to "trip" cellular base stations at 300 miles, even statute.
At altitude it is even not possible to trip the nearest cell bases, due to their highly directional antenna systems (in elevation).