If the section was for 21+ there would be like 5 people here. 18+ maybe 10. And it's not as if we could check ID anyways, so it's basically pointless in trying to enforce a rule like that. So we're just going on a case by case basis.
Essentially if a person becomes a nuisance in this section, they'll have their permission to view it revoked. That's also why all the members with extremely low post counts do not have permission to view it, they could be older than Grandma Moses, but if we can't see their posts to make a judgement then it doesn't matter.