I think when this finally hits a court of note that it will be smacked down pretty hard. Courts have already found, for instance, that there is no reasonable expectation of privacy during a traffic stop for the person being stopped.
The issue already hit the SJC (Commonwealth v. Hyde has indicated in lambda's link) and they ruled for the officer.
The issue already hit the SJC (Commonwealth v. Hyde has indicated in lambda's link) and they ruled for the officer.