I notice they complain about the standard port by which I think they mean the OBD II. Access to this means you've already got into the car. The point of this port was to stop manufacturers making you use their service network so I hope they don't use this as an excuse to try and get it removed.
Of course that doesn't mean it can't be made more secure.
I think one of the biggest problems for car manufacturers is that they sometimes mix the networks used to send engine and braking info with the entertainment system.