In Law when there is a missing or unclear text, we try to interprete it using different methods - historical, linguistic, grammar, situational, etc. The interpretations of the highest authorities, as judges from the Supreme Court sometimes equalize the law.

Since the Be Nice policy is vague and unclear, moreover it is very often violated, what would be the authoritative interpretations of this rule as to not come to misunderstandings as what is or is not its violation.