Is WiFi a potential flight safety problem?

[paulo]

I doubt there's anything special about the Lufthansa setup. It's off the shelf Cisco Aironets for the routing, and something equally off the shelf at the laptop end I'd expect. There are people who'd argue that the CAT5 part of the setup is worse for emissions.

I guess one could have manufacturers who didn't follow the power or frequency standards (lets say Acme Inc. sell 'WifiMegaBooster') so then there in that case there is an untested scenario.

Arguably if you were close enough to the avionics, and you boost say 20x, you'd now be in the same territory as the CAA tests on mobiles. (with Mag comp. deflections, VOR swing, that kind of stuff)