Well, not just any. All of the dorms had access controls. Some of the business school buildings and floors had access control. There was a somewhat-noted case i

Well, not just any. All of the dorms had access controls. Some of the business school buildings and floors had access control. There was a somewhat-noted case in the late aughts of MIT campus hackers (tunnel, shaft, and crawlspace-explorers and pranksters that the university somewhat turns a blind eye to) who had to fight trespassing charges after walking through an unlocked door.