Tony Stewart (fresh off a NASCAR championship) is racing in a midget car race in Indy. Last year at the same race he entered under an alias and in a junker car and killed the field. This makes me think; Is it OK for top racers to "step down" from their top leagues and race? Imagine Moto GP guys showing up at your WERA round on a borrowed 600 and lapping the field. (hypothetical of course and not common in motorcycle racing) But is it fair, beneficial, unethical, alright, racing is racing....?