the first car I knew had this was my subaru. It really is an awesome feature. Instead of staying on or even making a noise as suggested, its the logic of, just get the damn job done and turn em off! its excellent. The thing is with the subaru when the lights are off and the key is out, you can easily just turn them on again by manually switching the lights off and on again, so you have the best of both, if you really want the lights on while the car is off you can. So I recon I could figure out how to auto kill the lights without too much trouble, but I cant see an easy way of making a curcuit to do this other function that without thinking too hard could be needed.