They are telling you right. You MIGHT get away with that one S2 in terms of staying under the weather for power costs. The moment you add another rig with similar wattage, it may draw too much attention to power usage by those who monitor it. You will also notice a significant increase in heat in your dorm. If you have a roommate, they will not appreciate the noise nor the heat generated from the rigs.
You will be better off buying btc now before the halving.
Even if you get away with it it's going to have noise most would not want in there college living space. I did not mine in my dorm or appartment later on. I always kept miners with family with room for them.
Also with being on campus it depends on your setup. Some schools you will have trouble as all the security they add to make sure it's you and it could be a tough thing. If you just need to agree to TOS you might be able to clone mac address and put it on computer for a minute and click ok on TOS stuff. And hopefully that would get it past the software.