Chatboxes are very hard to maintain/moderate when you have the volume of users that go through LucasForums.
Also keep in mind that LucasForums serves all of LFNetwork, not simply SWK. The SWK staff can not decide what is added to LF on their own. Except the members of the SWK staff that are LF administrators, of course.
Also remember that if you're not using SWK... you're not using SWK. When there are few people around it does not seem appealing to use. When more people hang around, it will attract other users. If you want SWK's chatbox to be more active, hang around in it more often and get your friends to do so as well.