Actually had this happen:
First and 10 for A. (Don't recall exact yard line, but half the distance situation was not involved.) B was flagged for encroachment. First and 5 for A. B was called for encroachment a second time. Penalty was walked off by U, yes U could have just moved ball to front stake line, but didn't. WH then looks at spot of ball and the front stake and appears to be considering a measurement. Before WH can do anything rash, I go over and tell him that he should not even be considering a measurement. First and 10, two 5 yard penalties on B, it is now a first and 10. WH hat ignores my input and calls for a measurement. Ball is 6 inches short of a first down. WH signals first and inches, coach A goes nuts, I slink back to my LJ position. I don't recall working with that WH after that.