I think what is happening here is that HP started out as a site for people who could write pretty much what they wanted, but as time has gone on, Google Adsense has tightened the reins and HP has had to comply. They apparently don't want hubs that are non family oriented or that refer to or show photos of distasteful things such as certain body parts.
Google calls the shots and if HP writers don't comply, they lose money. Google knows that these things cause controversy, which in turn causes hard feelings, which in turn can lead to people getting turned off on Google.
Just remember, it's all about the money.