If it could be abused, it will be abused! I have to doubt about it...
No one, including police or any other agencies, should have access to control of running vehicle. I understand that in some cases it may make easier to do a police work. But even though and at the same time it could be very dangerous. And I repeat myself again here - dangerous not only for the owner of the vehicle, but for the surrounding people... Not everything that makes police job easier should be allowed. I think everyone may name a lot of examples, proving that.
I guess car manufacturers in pursue of a new money don't thing about it... But later on it will be difficult to stop it.