There is a certain class of user we call "legal trolls". This type of troll aims to undermine moderation staff and silence critics by looking for loopholes in the forum rules/netiquette, deliberately misunderstanding wording in forum rules/netiquette and deliberately misapplying legal terms or citing laws that are not even applicable to the forum in question.
Yeah. That's why there is no rulebook. People would be rule-lawyering all the time.