No real control for the changing population you might expect under each sign-up regime? Seems like in the first case sign-ups are super frictionless, so heavy t

No real control for the changing population you might expect under each sign-up regime? Seems like in the first case sign-ups are super frictionless, so heavy trolling is expected. Second phase has some mild friction, so results make sense. But in the third de-anonymized phase I would assume that any FB user can comment basically by default, so presumably the circle of discourse is at its widest point. In a world where someone needs to care enough to make an account to comment presumably the quality of post is higher than when any random passerby can leave their thoughts?