It seems to me like there's a lot of these going on and many of us are thinking about a solution. Well, I was surfing the net and saw this.
I'm not sure if anyone has this or if this will work since I've never seen a TL with their headlights stolen or how they stole it. I assume the thiefs had to open the hood to make it happen.

 

Don't think that would really do anything.... the thieves have been knocking off the bumper... then either prying the hood or the front of the fenders back... so the lock may make it tougher, but will probably just cause more damage to occur to your car. Best bet is to get some type of shock sensor that goes off as soon as your car is touched....

 

Unfortunatley these ****ers are not opening teh hood, but simply ramming a crow bar between the hood, fenders, and headlights to pry the units out.