Yeah, I've seen a lock-smith open it, they drill, which obviously is destructive (although a thief might just replace the thing around the lock, like the lock-smith did.<p>Anyway, the thief probably doesn't care about whether or not I can tell he was there. He want my laptop, because it translates to a fix. As a matter of fact, I've heard "they're insured anyway" as part of the self-justification among the petty thieves.