[Nextgrid]

> The aircrew can enable/disable the wifi at will.

Yes, but that does nothing when it comes to risk of radio emissions. Turning off the AP doesn't magically prevent client devices from doing whatever they want anyway. If there was a genuine risk of a client device interfering with the plane's equipment, turning off an AP wouldn't do anything about it, nor will asking the passengers to turn it off (some might not comply, forget or not even realize that their device has a Wi-Fi radio in it). You need either extreme control over every electronic device brought onboard (including X-ray scans, since implantable medical devices now have RF communication too), or enough shielding around the sensitive equipment to make RF no longer a risk - the latter has already been done for decades and RF is no longer (and I don't recall ever being actually) a threat to airplanes.