As much as I am entertained by most of these situations involving a pitcher backpedaling and a batter swinging and missing with a punch instead of a bat, there is too much gray area in baseball's self-policing.
The Yankees-Red Sox rivalry feels like its back. Did it ever go away? Maybe, by "back" I mean the front offices seem to be dueling again. The AL East is the Yankees, Red Sox and everybody else. The way it's meant to be.