"Slut shaming" is sexual morality + misogyny and sexism against women. I'd argue that it's the latter elements that make it objectionable. I don't think there is anything wrong, per se, with gender-neutral social norms that discourage certain undesirable behaviors in the marketplace for sex and relationships. For example, I'm not one of those people who think prostitution should be legal even when its voluntary and not abusive. I also think its shameful behavior for banks and VCs to be investing in companies like AshleyMadison. Like I said, barking up the wrong tree if you're looking for liberal pluralism.