How wrong do you think it really is to throw trash in my roommates room and lose my cool
It sounds pretty wrong. Why do you want to throw trash in their room?
Well my roommate is always tidy, I'm sick of it already.
Some habits can be annoying but throwing trash in their room is wrong. It could lead to them terminating their lease and you will have to find a new roommate.
I don't care, I'm really doing it next time, the extreme tidiness is annoying.
I would really encourage you to change your mind about following through on this plan. You'll probably cause extreme distress for your roommate if they are really obsessive about their tidiness. If you're unhappy with your roommate situation there are more rational ways to get out of it.