a hole somewhere on the outside of the bag so you can flip it on and off without opening or disturbing the device inside. or you could make an electronic remote switch and use that if you wanted to make it extremely convenient.thanks for the feedback!
a less obvious way could be using a magnetic switch like are used on windows and a magnet to operate it. it would need to be the normally closed type switch and would open when the magnet was placed over it.
cool, it would be really neat if you made it so that there was a special trick to opening the bag w/o an alarm, so 