"the problem with the rules, is that they are subject to change without further notice."

I posted this picture in a social media art group years ago and I actually got in trouble for it. Yet people were allowed to post real pictures of themselves in underwear with genital bulges, cheeks hanging out of panties, and women and men posing in sexual suggestive positions with no problem. This picture was flagged by someone as in appropriate even though the other pictures were allowed.  Decisions to allow or not allow can change just as fast as the minutes pass.  Sometimes a single argument for or against something can influence what is done.  The law will always have the first say, but it will always be a "coin toss" for all of the gray area topics and questions that come up.