A pitcher needs to be able to command both side of the plate. It is very difficult for a pitcher to be effective if they allow batters to take away half of the plate. It is a valuable lesson that HBP are going to happen and pitchers cannot get rattled when they do. The pitchers coaches also need to get into the umpires ear and make sure they are watching for batters leaning into pitches. Anything over the plate or in the river should NOT be a HBP, but a strike or ball on the batter.