@KaySpence,
I see where you're coming from and, as a rule, I think 16 or 17 is not bad
for a limit. On the other hand, A2K is kind of a microcosm of the 'Net
and I think most folks, even 13-year-olds, gravitate to what interests
them. If sex and relationships interest them, then that's what they'll
read. Compared to the 'Net as a whole, I think the sex and relationship
content of A2K is mind-numbingly (and libido-numbingly for that matter)
dull.