I took my Skyforce II moving map with me on a trip to Finland recently, Was asked by the flight attendant what I was doing, as I did have the attenna stuck onto the window.
Once I explained what it was she dissapeared and on returning told me that the Captian objected and could I switch it off.
Fellow passenger later told me that she just went up the cabin then came back, never having asked the captian.
So the next time I think I will ask prior to taking it. As I was definatly given some strange looks by the flight crew after that.
Best advice I could give after this is to ask the chief steward if he can check with the flight deck if the have any problems with it.