What Should Be Allowed For Review?

Baseball has recently allowed the use of video replay.  It allows umpires to review fair/foul ball home runs, ball clearing the wall (HR), ball in fair or foul territory, and fan interference.  But should there be more reviews in pro baseball games.  Umpires make horrible calls in almost every game.  Players who are clearly out are called safe and vice versa.  That in my opinion needs to change.  If someone is safe or out but is called the opposite, they need to be able to review that.  I don't think you can use replay on balls and strikes because the game would last all day and it would end up ruining the game.  Also, all umpires are different.  Their strike zones are completely different; some have a wide zone, some have a tight zone, and some have a low or high strike zone.  So balls and strikes need to remain the umpires call without any interference from video replay.  If a fan interferes with a players right to the ball and there is no review, it is an advantage to the batters or baserunners.  In the rules it states that a fan also has the right to the ball.  But they aren't the ones playing and they shouldn't even try to reach over the wall if the player has a chance at it.  Enough balls come out of play that you will sometime get another chance to get a ball and not end up on national television looking like an idiot.

I still like how  MLB is using video replays but they do need to use it on a few more things.  They also need to make the rules for use more clear and understandable.