As sibling commenters have commented, yeah, the higher-security rooms used Medecos instead -- they had not only up * down for the pins but also directional slant (don't really know how to describe this, but pretty and much harder to copy or pick). But also, think through student motivations: I used my master to get into the steam tunnels, to find cool things, to gain access to the old wind tunnel, to find space to make art, to win at capture the flag. Who wants personal info or allegations of misconduct? And moreover, isn't the computer a much lazier vehicle for finding such info?