Live Free or Drown: Floating Utopias on the Cheap 17 years ago
(My kibo alert has failed me, and it's far too late to comment here, but I will anyway)
Lots of situations can be interpreted as slavery, and a lot of the creative interpretations are likely to revolve around children.
The quoted comment shorn of conversational context wasn't all that illuminating, so I expanded on it here: http://syncretin.livejournal.com/73427.html