I certainly hope the engineers their are staying on top of the recent deluge of Rails patches. Tesla's database has a huge amount of private data; mostly containing information about rich and influential people. A black hat could undoubtedly profit by tracking people and correlating their location to affairs/secret business meetings/etc.
I'd just like to add that they enabled it by default for cars they lend to media outlets for reviews after the Top Gun thing. Some people in the other thread were freaking out about how much Tesla knows about your car but a regular customer can just opt out.
