This is obviously why they implemented the batters box rule and I know for a fact they were being taught to remove the lines - the problem being discussed is the lame question about the coaches box.

taking out coaches box line
 

At the Federation rules clinic I attended the clinician suggested we give the coach warning first and if a coach/es for that team does it again then call a strike on the batter.

My thought process on this is: after you bang the batter for a strike and the coach goes ballistic, there will be a chat with the coach followed by an incident report regarding the ejection.