These microwaveable cornbags- can't they be really dangerous, as they are being heated in the microwave oven, which is controversial and may even be cancer causing? The corn in the bags being heated by the microwaves, isn't that just re-radiating the microwaves back to us as heat? My family loves them because we have long cold winters, but i am worried they might be very dangerous!? Can anyone give me some medical or scientific information to put my concern to rest?