Right now it's piggybacked directly into the current posting system. So, what happens if some knob picks a separator instead of a forum and hits the 'new post' form with that?
Redirect somewhere else? Send them to Slashdot? IWE?
With javascript you could catch that error and pop a warning message.
Actually, though, I would just reload the forum main page. But of course that would require trapping the exception in the posting code.
=== Microsoft offers them the one thing most business people will pay any price for - the ability to say "we had no choice - everyone's doing it that way." -- [link|http://z.iwethey.org/forums/render/content/show?contentid=38978|Andrew Grygus]