As for the laptop, it depends...if the laptop user turned wireless internet on, then it would start emitting signals and they can interfere with radio equipment. If you dont believe it, put a wireless modem or mobile phone next to a working radio and see what happens to the radio signals.
Willowz 269:
don't worry!! There is already a study about these interferences. They will be not able to prove that a lap top was the problem or a phone.. How can they accept that radio frequency can interfere with the super complex computer architecture of the modern aircraft?
some "smart" are now shouting requesting a law that will chain you down! Why don't incluede also a fine for these passengers that still read the newspaper when the safety PA is done? and Then they law suit the airline because they did not find the door quickly..
Service Carts is another problem: it would be easy to make them safely "grounded" at the aircraft floor. and the airline industry should compensate those hit by the carts indeed.
the others should have learned a lesson: an Aircraft is NOT A RESTAURANT or a nice high platform to WALK AROUND! Airplanes Flyes! By keeping your seat belt unfasten is just play idiot.
However how many CAT or In flight upset can you count in one year? Just keep these pictures of the injured stupid passengers on the safety video and I will guarantee people will unbuckle only to go to the lavatory.
Your lap top is safe unless you have put into unauthorized certified battery that could explode and start the most serious problem of all when airborne: fire!