i also figured out a way for them not to drive your car very far...

if you leave your car in your driveway or w/e for a really long time, just open up the vavle to your slave cylinder. if they press the clutch pedal the brake fluid will pour out, after a while, clutch pedal will stick to the floor and you wont beable to put it into gear, leaving the theif in the middle of the road, abandining(sp) your car