Like others have suggested-I say let Russians who pledge or sign a document that they never knowingly "used" or will use PEDs compete in Rio -but only under the Olympic Flag and anthem...that way the real culprits and politicians will be punished and hopefully the athletes will continue to follow the "oath" in the future. Why reward a system that apparently systematically used PEDs. Of course Russians competing should face closer scrutiny at the Rio games and they need to made aware of it.