Do you love that Dirty Water? Do you get that flutter in your heart as you walk into Fenway? Do you still tear up when you hear Joe Castiglione ask, "Can you believe it?" Then come root for the home team with your fellow Sox fans! Talk about whether that was a balk, who should really be MVP, how Bobby V. is going to kick the clubhouse into shape, and where the hell Renteria is nowadays.   If you're simply a fan of the Greatest Game On Earth, then welcome to a group where others share your passio …