I am going to trash my roommates essay while he sleeps.
That's mean. Why do you wan to trash his essay?
Because I want revenge and I won't get caught.
Revenge is not good and you could get in trouble for trashing his essay. You might even get kicked out of your living space.
Nahh, I'm going to go back to my room and destroy his essay.
Even though you don't think you will be caught, it would not be a good idea to trash his work. He might find out and then your things are going to be at risk.