Plate Ump hit by pitch on purpose

[fastpitch]

As a coach I've heard it joked about but never thought it was funny. As a rookie umpire after lots of 10U rec with some catchers that don't necessarily catch when they are trying can relate. I've heard pitching coaches tell pitchers to hit batters to mix things up, but in 10 years of coaching, never asked a girl to hurt another by pitched ball or otherwise. In fact, don't think I ever had a pitcher that would have done it, if asked to - not so sure about some of the catchers though

How would you know it was intentional? What would have to happen before you started making ejections? What if the catcher just lost her stance or was fooled on the pitch?