I've hired a car from Glasgow airport for a week. I need to take someone back to the airport tomorrow who will require extra help so I'd like to park close to the entrance (where the car hire happens to be) and I could be there for a couple of hours.
The car appears to have some sort of transponder that automatically opened the barrier when I hired the car, and presumably it will be the same when I return it. So is there anything stopping me using the car hire place as a free carpark for a couple of hours since the car is theirs anyway?