I'm admin for a writers forum on Facebook and I try to make sure everyone's posts are approved each day. The only content controls on our group are that there be no hate speech and that posts be kept appropriate for audiences as young as 13 years of age. We don't currently have anyone that young; but, we did have a 15 year old a few years ago. Anyone who writes may join, as long as they answer the membership questions and agree to our rules and guidelines.