Would like to think I can better that with an example of too little security. The little brother of my cousin managed to get into the BIOS settings on his computer and remove the HDD from the boot list. The computer wouldn't do anything went started up. He had no idea what had happened till I diagnosed it. He was understandably bemused. I flashed the BIOS battery, and suffice to say, his BIOS is now locked.
2.1 Ghz Core 2 Duo processor :: nVidia GT150m :: 15.6" HD LCD :: 4gb RAM :: 320gb HDD
New player: iPhone 4 32gb