The rule referenced pertaining to criminal accusations was added in light of the #metoo movement to give victims an opportunity to share their stories here if they chose. But we added the first-person and non-anonymous caveats so it did not become a free-for-all of accusations by unidentified posters.
Accusing someone of harassment on the site, based on the comments made via site, made public for assessment of the situation to all those reading the site would not automatically rise to a level requiring intervention.
Per our rules, all moderation is performed at our discretion, and we are not legally obligated to moderate anything. We may opt to further adjust the wording of the rules to accommodate issues/questions as they arise.
Obviously, moderation is typically not a clear cut issue, unless someone is using profanity or blatantly name calling, and we prefer to err on the side of community-based conflict resolution with a lighter hand from us vs. us coming in to nit-pick posts.