Sometimes people eat in class and put their feet on my desk, and I don't want them to do either.
Well, what reason do you have for not wanting them to do that?
I'm the adult. They need to follow my rules.
That seems reasonable. If they are in your class, then they need to follow the rules you chose.
Exactly. They have to do whatever I say.
While I don't think you should act so high off of your own power, I do agree with you that they should listen. If you've set rules for a room then it makes sense that you would expect them to be followed.