Lock the console as Steve suggested. Though that can be gotten around if people are *that* malicious, which it seems like they are from the sounds of it. That one comes down to the old "there are no technological solutions for people problems." You're putting controls in place in your company for a reason, and people who willingly violate those policies should have consequences for doing so (up to and including termination of employment), just like there are consequences for violating any company policy in any area. Or should be, not sure how things are in the Philippines but here in the US circumventing company security procedures will get you fired rather quickly from most places.