Originally posted here by gore
Hehe, I for one have gotten access to a Hospital's Main IT area. Locking a CD-ROM drive is good, but I know how to pick locks and can usually even get the numerical locks. And, it's quite easy to slip inside with a rubber glove on and open the case. Now I know a lot of servers will report that the case has been recently removed. Trust me, I've made that message pop up and almost pissed myself.
But again, you can make that go away as well.
I guess it really depends on why someone wants in. If all they want it to destroy your servers, then well, that's easy all you need to have is rubber gloves, and wear a thick suit (It helps with the skin particles that fall off every second you're alive so sniffer dogs have a hard time finding you as well).