It would be nice if, for an additional fee, I could order an airport-safe charging cable for my phone. This is needed because chargers at the airport, on the plane, at the hotel, etc. are obvious places to implement spyware or rootkits, especially since the phone is often unlocked while plugged in, as the user is actively engaged with it. This means:
The cable permits charging but destroys all signalling in all distinct frequencies used by USB (of which there are a few). This might be as easy as disconnecting a data line, or as hard as adding some out-of-spec capacitance.
The cable is a weird color, so I’ll never make the mistake of inadvertently swapping it for a normal USB cable.