Some athletes come back but even if they don't the athletic department brings in so much more money than greeks, the school has to look the other way. They can't afford not to. The University of Michigan football stadium has over 110,000 seats and everyone is filled every Saturday. Basketball is the same way. The NCAA Tournament is worth billions and each school gets a piece of the pie. Steve Smith gave something like 5 million dollars to Michigan State. How much do fraternities give? Maybe they raise $500 with a carwash.