The don't care about the alarm going off.

Think about it this way: in theory, people hear a car alarm, look, and if they see a crime, they call the police. So now the cops are towing a car, the alarm goes off, people look and what? Call the cops and report that the cops are towing a car please send more cops?

In practice, people don't look for car alarms to report theft. But you know, in theory....