Like all large Internet domain purveyors, GoDaddy makes a living off of selling and supporting websites. What it doesn't do is prevent someone from operating a website using a domain that contains your trademark, or otherwise tries to divert business off your hard-earned good will.
Policing your trademark rights against threats in cyberspace, especially if it meant selling fewer domains, would be contrary to the very life blood of such companies. As one victim recently learned the hard way, fighting...