I felt myself starting to sweat as I read. I can't imagine doing this at my apartment complex, let alone at someone else's. Messing with building controls (old or unused as they may be) sounds like a great way to get your lease nixed and your ass out the door quicker than a lawyer can say "Yeah, I can't help you here, they're well within their rights to evict you for that."

I was hoping they'd mention something about the legality (or lack thereof), but I guess that's an exercise left to the reader who wants to try this out at their own apartment.