I agree that A-Rod will get knocked on his ass if the chance arises. First, it can be stated--honestly--that it is just retaliation for Youkilis getting hit today. Second, everyone else in the league would understand and be grateful.
The situation doesn't come up very often for A-Rod though. I think you need to be up by a run or two, he needs to be up with at least one out (preferably two), and there can't be anyone on base. I have NO problem if Beckett throws one or two up and in to set up his curveball. I think Dice-K would be even more innocent if he were to 'let one slip'.
I'm 99% sure that A-Rod wouldn't come to the Red Sox. He would get his jab at the Yankees by leaving them despite their "love" for him, but he wouldn't go to Boston. Only scumbag stars go from one organization to the other.
the funny thing is that I don't hear many yankee fans disagreeing about this. They say "he won't leave, he's doing well", we say "yeah, but you guys drove him into the dirt and treated him like he was a member of the Red Sox. Why would he want to stay?" and they are silent.
If A-Rod stays there he's even more soulless than we thought. If he leaves then he backs up what most honest critics say: he's a smart, self-aware guy who managed to convince himself that clutch hitting exists. I think the tear he is on right now is proof enough that clutch hitting doesn't necessarily exist. A-Rod isn't suddenly a good clutch hitter, he's suddenly an ungodly hitter every at bat. The guy is raking for real right now and it is imperative that he gets knocked on his ass.