I have no objection to women degrading themselves of their own free will. And I guess that's the important thing.
Meatholes as a concept is well known now so if a girl agrees to appear in a scene then she'll have a pretty good idea of what is going to happen. Ad what works and what doesn't.
Where I would have a major problem is where the girl is coerced into it or is so drugged up to her eyeballs that she doesn't know what's going to happen to her.
So to any girls who have appeared in Meatholes what was explained to you? Do you feel hard done by? Did you enjoy it? Do you regret it?