Had a lucky escape with mine at work, left the lights on but one of the lads in work noticed and told me...

Was sat there, thinking that the car used to have a beeping noise when you leave the lights on and wondered why it hadn't done it......then remembered that it never does it when the engine is running, and since I always set it up for remote-start in work, the engine is running until after the door is closed again after I get out, so the door's are never open with the engine off!