I think we talked about this ages ago and felt it wasn't needed. Anyway, everytime you add something like this, which would require an extra modification, it just creates more things to go wrong. User data is a pretty critical area so it might be a bit scary relying on a mod someone's come up with to just delete a few non-posting users?

See what I mean in this topic: http://www.phpbb.com/phpBB/viewtopic.php?t=298724

It looks really easy going by the first couple of posts, but quickly seems to turn a little more complicated than they thought. Also that's just PHPBB, where this site is PHPNuke with PHPBB integrated inside it, which makes it even more complex.

P.S. If this is related to Jaguar remember that they did make two posts, so it wouldn't have got rid of them.