Tetris Under Fire

Andrew Bednarz writes "How many people are aware of what The Tetris Company is doing? They're claiming they own copyright on "the look and feel and trade dress" of Tetris. They are attempting to remove all unauthorised tetris games!" Considering that there are dozens of tetris clones (many distributed under the GPL) I suspect their quest is futile. I'm not sure how I feal about this one. Their claim is probably legit, and the above story compares this to the industry allowing only one game in a genre, but tetris is tetris- its not a block game genre, its a specific game with rules we are all familiar with. Different side scrollers have different rules. Hmm. Wierd case. What do you think?