oh god you actually made me laugh out loud. no they're not when their TOS are so purposely vague that they can enforce the rules how ever they see fit, you know who can tell them to stop that? the big bad gobnent. as it's been pointed out this is the difference between internet and social media.
policing is another word for enforcing the law and in this case the law would be "no child porn" which is in fact, regulation. I should be surprised by this level on mental gymnastics but I'm not.Taking down child porn is policing, not regulation.