This is from mid 2017. "First notified Tesla on 31/08/2017 ..
Tesla vehicles produced from June onwards use a new key fob". Not sure if the new fob is significantly better as the presentation is not clear there.
And the "fix" for people who bought the car before then was adding an option to disable the automatic unlock (so you have to press a button) and/or require entering a PIN to actually drive the car.