With a lawsuit already underway in Japan, Tecmo revealed it opened one in the U.S. as well, seeking to put an end to hackers who create, host, and contribute in any way on infringing on Tecmo's games. The heart of the lawsuit is it wants to stop those hacks that add nude patches. Tecmo is also seeking recovery of damages for the infringement. Tecmo general manager John Inada told GameSpot, "What we've invested [in our games] is millions and millions of dollarsā?¦this is real cash, not play money. Regarding the M-rated skins, it's not an issue of nudity. It's simply the violation of our IP (intellectual property) and the code."
http://www.gamespot.com/news/2005/02/09/news_6118220.html