Anyone else find this disturbing? Tetris has without a doubt been a huge leap for the puzzle-genre. But that was 24 years ago. Should ID software be allowed t

Anyone else find this disturbing? Tetris has without a doubt been a huge leap for the puzzle-genre. But that was 24 years ago. Should ID software be allowed to sue all other 3d shooter makers because they build on the Wolfenstein idea? And how do you determine a clone, where do you draw the line? Is Dr.Mario a clone? What about the zillions of Bust-A-Move and Jewels variants (basically tetris in reverse)?