I once asked a turboprop Captain why I couldn't use my cellphone on the plane, he said it interfered with the ILS recievers.
If my scanner can beam to and upset the ILS recievers on the nose gear of a Boeing 747 then I AM worried!
As for using it on the plane, I'm just going to close my eyes and pretend I didn't see you take it onboard
on mythbuster a few days ago they did the cell phone on a plane theory,they first made a model of the cockpit and all the interments they alll so used a cell phone generator to make the signel higher and it took the higest signel to make a differnce in the way it acted.then they did it on a real plane i can remmber the name (i am still learning types of aircraft) it was a full glass cockpit,thought they could not allow it up in the air the airline would not allow it (cant remmber name) and it did not do a thing they got it as high as it would possibly go and it did nothing,it was a cool episode i will see if they have more info on it.
click here for the episode i hop you like it