if the topic of sex loses it's stigma then not everyone is going to talk about it the way we would.

Very true.

I recently read the book Sex and Dawn which you might appreciate. As for posting or talking about this stuff, I'd definitely get the permission of my spouse first because that is a very intimate, private act. Unless they are comfortable talking about it, I won't be comfortable talking about it.

I think fraud and trust go beyond property rights into tribal norms, game theory, and such. You can read more of my thoughts about that here, if interested.