I've subscribed to a few forums in BST section and I've went to the Community Spy and clicked the Only Include Subscribed Forums. However, it seems that the effect only comes in play after a few minutes. Until this time threads from all of the sections keep showing up (not only the subscribed sections) along with new user registrations as well. I don't know if this is a browser issue or a problem with Javascript, but it's kind of annoying.