You may well ask what possible pleasure these sad people get from looking at track, groundspeed and elevation for several hours. Rather that ask them to switch their devices off wouldn't it be more humane all round to open the door and lob them out of their own and everyone else's misery?
Unfortunately however this must be a more common human flaw as I notice most aircraft are now fitted with passenger navigation displays. The cabin crew seem a bit cavalier with these and tend to switch them off in order to show some execrable BBC sit com presumably designed to put the passenger under such pain and stress they don't notice how dreadful the all-day deli is.
If they left on the nav, we be spared both the trash and would have no excuse to switch on GPSs thus bring the plane down killing all on board...