Flying Jumers
I agree, I have heard stories of jumpers grabing the keys on the way out. The owner of the DZ I fly at would never let that jumper on the grounds again if that happened. As far as the fuel cutoff, that happens now and then, just always check it before you start your take off roll. If the student hit it when they got in, you will have just enough to make it to about 400-500 AGL. Not fun!
I love flying jumpers no better way to build hours.