Obscene Content rubber stamp

Proposed Censorship Bill Voted Down in Maine

Whether or not it contained the criminalization aspect, this bill, had it been voted into law, would essentially be red flagging books that contained potentially obscene content. Who would be responsible for policing which books are considered obscene? The decisions would be purely subjective, based on the opinions of parents and community members. And how obscene would it need to be to require consent/legal action?