Situation: Batter steps into batters box, runs the end her bat along the chalk line of the opposite box (once) to "measure herself up" to the plate. The PU tells her not to erase the lines. Another batter later steps into the box, levels the dirt with her feet. Dirt of course goes over the chalk Line (what is left of it). The mount of dirt that went over the line was minimal. She did not scrap a foot worth onto the line. PU tells batter that she cannot erase the lines, calls time out and informs coach that if another batter touches the lines they will be charged with a strike. Niether batter was intentionally "erasing the lines." Both batters are experpienced travel players and do the same routine everytime. What is or is there a rule that prohibits the batters from touching or "erasing the lines"? Could a player be charged a strike?
Thanks