In my humble opinion, a pitcher should throw inside to establish the inner 1/3 of the plate. It seems today the emphasis is on pitching away. I hate it!! When my son was younger, 9 or 10, he went through a phase where I could not get him to throw inside. We had a discussion about this one day. He was very frank with me and said, "Dad, I am afraid to hit him. I don't want to hurt him." I explained to him that hitting a batter (accidentally) was just part of the game. If he was afraid to hit a batter, then he should never pitch again. Son got the message. He was the only one of our pitchers that would throw inside consistently. Today, I think he secretly loves to come inside. He typically establishes the inside very early in the game and then adjusts as needed, especially to a lefty. It makes his curveball almost unhittable. The only time I hate the inside pitch is on a 0-2 or 1-2 if the pitcher is not confident and has good control. Nothing worse than setting up a batter perfectly only to put him on base freely. Always seems to come back to bite you on the bottom.