Just as a general rule in conversation, invoking so-and-so's law or this fence isn't a productive tactic. Instead, ask the question that wisdom suggests you ask, and for this bothersome fence in particular, keep in mind that you are weighing an unidentified consequence against a proposed benefit, and at least endeavor to expend some of your own effort on suggesting what the value of the fence might be or how one might go about finding it. You may find some of that effort has been undertaken and that failure has not been shared.
Just as a general rule in conversation, invoking so-and-so's law or this fence isn't a productive tactic. Instead, ask the question that wisdom suggests you ask, and for this bothersome fence in particular, keep in mind that you are weighing an unidentified consequence against a proposed benefit, and at least endeavor to expend some of your own effort on suggesting what the value of the fence might be or how one might go about finding it. You may find some of that effort has been undertaken and that failure has not been shared.