Hey RAD,At some point a catcher putting a Target/glove where the intended pitch location is going to be will give away details to help the batter. Particularly when coaches or dug out see's catcher-presenting location/target with their glove then can call out pitch location for the batter.
Pitchers can use other visual cues for their pitch location. As said earlier,
things like the catcher's shoulders or knees.
What's your take on the catcher having their glove facing the ground as pitch is delivered? It's becoming very common in baseball and now seen more in SEC college softball. I think it especially helpful with drop ball pitchers getting strikes called that are actually low in the zone. Very difficult for ump to determine if pitch was low because glove is moving up on every pitch. Maybe someone has some video.