Elon Musk is someone who takes personal offense to criticism of his company/products. If a hack is to showoff an awesome new car, which this is the case, I doubt he would have any issues with it.
On the other hand, if some guy found a major security flaw and posted it all over the internet I bet the car would be remotely driven into a brick wall at 100mph+ with the driver inside.
http://www.huffingtonpost.com/2013/06/24/michael-hastings-ca...