The thing we try to do is keep the forum user-friendly and easily to read by members and visitors. A lot of things go into the General Discussions forum, which is okay, but with so many threads there, many are lost in the mix. So if it obviously is a Money or Health thread, etc., we'll move it into the appropriate forum when time allows.
If we add a new forum, as Matrix did recently for English Language, then we move any related posts there. Matrix set it up recently, where whenever a thread is moved, there is a 3-day redirect, so there's no confusion in finding it. We're easy here, members can post wherever they feel comfortable, we don't consider anything like that an infraction at all.