Yep. Human moderation.
The only small problem is related to the race for making steemit big. Big big big in a short period of time. That means: we welcome everybody. We need everybody.
And for the moment it's not a problem. Maybe in a year or so if we'll lose to many good writers with a lot to say towards boobs than we'll have some bad feelings about this community. Time will tell.
Cheers.