A clarification on enforcement from Toby Elliot:
"If everything is clear and both players are acting on mutually-understood information (both active and passive), then we’re not going to worry if there’s technically a violation."
Generally speaking, if you and your opponent don't have an issue with it, a judge isn't going to swoop in and make you fix it,
In other words, it's prohibited to drive on red, but if there are no cars and pedestrians that's ok. It's quite silly to introduce the rule only to tell players to ignore it, but keep the right to punish players for subjective lack of "mutually-understood information."