I love bat flips in clutch situations... A buddy of mine was saying how he views them as "disrespectful". I just don't see it that way. I compare a bat flip to something along the lines of a gronk spike after he scores a TD, or someone doing a dance after scoring a TD.
Baseball has many unwritten rules, batters dipping their shoulder circling the bases after a one run used to be a big insult to a pitcher. I am sure baseball is like society getting more uncivilized every day.