In most cases the car trackers are trivially simple for criminals to defeat. They really aren't a big detergent. Even if you're using a good aftermarket one, it

In most cases the car trackers are trivially simple for criminals to defeat. They really aren't a big detergent. Even if you're using a good aftermarket one, its not a detergent but a recovery tool - if they know about it they can usually disable it. If you're friend has had their car stolen so many times, what are they doing about it?