Don’t jack my Mac!
A neat idea that basically installs a car alarm in your MacBook Pro! Using the remote to active the alarm you’ll hear the ‘chirp’ just like you do from a car’s alarm. Then using the built-in hard drive sensors that were originally purposed to stop the hard drive in the event of the laptop falling, the alarm will sound if anyone tries to run off with it.
An idea that may discourage potential notebook nabbers… but car alarms can get really annoying. Imagine having one go off in the room you’re in. Actaully, I’d probably go around bumping tables just to set off all the alarms. 
Perps beware: ‘Jacking Macs’ could prove hazardous | CNET News.com
This one makes sence “One’s first step in wisdom is to kuesstion everything - and one’s last is to come to terms with everything.”