There's No Cheating in Baseball.......

[MD Longhorn]

if we're still talking about MLB here, I don't think that happens that often. Being ON the lines is nothing anyway. If they are so far back they are actually out of the original box, a good MLB curve across the front of the plate is nearly unhittable.

In our games ... if I see someone not in the box before the pitch, I tell them to get in it. If that's what you mean by "enforce", then yeah.