This also makes it impossible for other mechanics to diagnose and fix your vehicle. It also makes it much harder for you to use that port to diagnose and fix t

This also makes it impossible for other mechanics to diagnose and fix your vehicle. It also makes it much harder for you to use that port to diagnose and fix the vehicle yourself with readily available tools you can buy. The OBDII port is a blessing, not a curse. There are things you can do to limit the telemetry (this will be on a case-by-case basis for the vehicle and manufacturer, so I'm not going to detail specifics) but that is one of the sillier things you can do.