~shakes his head~  now i have seen an article posted by a few hackers a while back where they acutally made a bomb (with a digital controller) and set it up inside a laptop and hooked it to the serial port if one didn't use the correct password a program accessed the port and sent a command to detonate the bomb..  BOOM!!!  there went the laptop.  Great anti-theft just so long as you didn't really want the laptop back but unless you have access to mil-spec explosives nothing impressive enough to actually do damage to anything but the laptop.