What is the purpose of the shield in a microwave? Isnt it to keep the dangerous microwaves inside the oven? Since microwaves are not good for organic material outside the oven wouldnt it be not good to the organic material inside? Granted the organic matter outside is alive and the organic matter inside is dead and that could be the reason microwaves are dangerous to us but not to the food we are cooking, but I am not so sure. I am probably over reacting but I try not to use the microwave for anything if at all feasible.