You're staying at a hotel and you notice a car has it's lights on in the parking lot.  You stop by the front desk and let them know, but they can't do anything about it because they don't keep track of whose cars are in the lot.  What else do you do?  What else can you do?  Do you go to the car and see if it's unlocked and turn the lights off yourself?  Do you set off the alarm so they have to go check it out?