What made you reach this conclusion? Mining would take advantage of the situation, so how do you figure that he wouldn't be taking advantage of the situation?
It doesn't seem like anybody is talking about doing it on a large scale. We are not turning the entire dormitory into a mining rig. It was simply suggested that OP build a desktop computer with a high end GPU or two, this would be a decent start to mining and there's no way the administration would disallow you to run your own computer. The school wouldn't know any different from simply running a desktop computer.
You just said so much against this user mining and now your conclusion is waiting for the outcome. I'm very confused.