"what-if their device somehow actually DOES interfere with the navigation systems?"

i've yet to see any conclusive evidence either way. but, WHY would anyone take the risk until its deemed safe?

the "it only generates a few watts" reasoning is faulty. your phone may only generate a watt or two, but multiply that times 100? 200? 300? 400? 500? depending on the aircraft and its number of seats.

people are such twits...