Mitsubishi did this a few years back with the Evolution, they would look into track records and void warranty for the cars involved with racing. The abuses of everyday driving are very different from the abuses of a track (unless you driver that insane on a street for extended periods of time), these companies are just protecting themselves from customers who will continually return something whenever the customer should know to cover their own butts whenever they abuse their car in such a way. I don't blame them for this, the launch control seems like a different issue, if you advertise and praise your auto for having something so ingenious, then you should find a more reliable way of providing such a feature to your customer, rather than charge $20k for a transmission and then take the feature away entirely.