A fan of the original Super Mario Brothers game lovingly recreated the entire game in a web-based format. As the owner of the copyright on the Super Mario games, Nintendo chose not to welcome and and embrace this project, and instead threatened its creator with legal action. And so the site, Full Screen Mario, is now offline.
Unfortunately, it seems that Nintendo is one of those companies that can't see past even the very remote possibility of something eating into their profits. They also have a hair trigger for legal solutions, releasing their lawyers at the slightest provocation, when there are always better - and less hostile - solutions. The upshot of all this is only that Nintendo has damaged its own image in the eyes of fans. Way to go, Nintendo!