Auburn - Did They Cheat? ; Where Does It End?

When will in end in college football and academics? Today I read a story where some of the Auburn football team which finished ranked number two in 2004 may have got credit for courses they really didn't complete. According to the New York Times on of the players was Cadillac Williams of the Tampa Bay Buccaneers.

One of my questions is how many universities do this and is this just the tip of the iceberg. It seems cheating or not complete courses are becoming normal and it gets swept underneath the carpet. Makes me wonder what other things also get hidden until someone drops the ball and it's leaked out.