Have you got any nice graphics cards, pmsl

Nah, if it's a case of one guy is exposed as a thief, or x number of people are under acute suspicion, then in the words of Mr. Spock: "The needs of the many outweigh the needs of the few".
As for not grassing a m8 up... A m8 wouldn't risk you getting put in the frame for theft would he? What sort of "m8" would let everyone fall under suspicion, with everything that is implicated with it... look good on the CV wouldn't it...
"Investigated for theft of computer hardware"
Current Status: "Unproved / Lack of evidence"
People would be falling over themselves to give you a job under them circumstances...
NOT!