I would agree that the idea of teaching a catcher to protect the umpire is a bit misplaced. As stated by others, a good catcher who is doing their job already protects the umpire. However, I remember a situation that to this day I truly regret. I had a VERY inexperienced and poor jv player. She wanted to try catching in the worst way, so much so that she went out and bought all brand new equipment for herself! Despite working with her in practice, she was horrible at catching. After about the fifth phone call from mom and the constant begging from the player, I told her she would start the next game behind the plate. In just the first inning alone, 10 passed balls (some of which were called strikes!) 5 errors (she actually made a great throw to second in an attempt to cut down a runner who never left first base!), and numerous other faux pas. After the inning mercifully ended, the poor umpire walked over to me rubbing his battered and bruised arm and quietly asked "What did I do to deserve that!?" I pulled her and ended the experiment right then.