I think the oratory about drunk drivers is a smoke screen. One has nothing to do with the other. It is wrong to drink and then get behind the wheel of a car. It is wrong to be part of MLB and take steroids. If the players really want to send a message that they're not taking the steroids, then they need to get behind the tough policy and not try and derail the whole thing.
Having said that, I too think Congress has better things to do than worry about steroid use in baseball.