@ehBeth,
I think the key to this all is seeing it as a response to the needs of the
Phil Forum Folk. This gives them a way to segregate themselves, regulate
who posts, and moderate their own forum by their own standards.
The rest of A2K would still be free to post philosophical topics, tag them,
and be able to find them by tags. These posts would reside entirely
outside of the Phil Forum. As for those within the Phil Forum group,
they could post to these "open" A2K threads or not, as they they saw fit.
On another note:
If having a Latin group would require our usual one-off questioner to
register with A2K, apply for membership to the group and then wait for
confirmation before making his/her request for a translation, then I no
longer think a Latin group would be a good idea.