Do you ever call this?

[MD Longhorn]

18-year softball ump here. Never got the memo saying that the rulebook did not have to be adhered to strictly. So, archer, which parts of the rulebook are we now allowed to let slide?

Sarcasm aside --- if the field permits it, call it by the book. Like it was said, if you ever let something go because "they gain no advantage from it", then there's no disadvantage in sticking by the rule.

On the other hand, where the field is in need of some help, I'm not going to cause the girls to twist ankles in order to stay on that rubber. However, in a case like this - it's our job to inspect the field beforehand. If the mound has a canyon (and we've all seen 'em), we should let BOTH coaches know - before we see their pitchers at all - that a little leeway will be given regarding their pitchers feet remaining on the rubber.

Safety first. If it's safe to call it by the book, then call it by the book.