We always have a nice relaxing meal in our room during our trips to WDW. I agree that there are some nights that you don't want to leave the room because you are so tired. This last trip we had chicken quesadillas, grilled cheese sandwich, grilled chicken and fries. It was delicious. It was called room service. 

Because it has been my experience that even IF someone spoke with and got approval from the hotel manager him/herself, there would still be any number of people who would object to taking one's own microwave into their room.