Talking bout privacy, something I noticed was that User Bios are able to be seen while someone is not logged into the forum, and yet signatures are not able to be seen by visitors. Seems like maybe this should perhaps be the other way around.

Branching off from that, when logged out of the forum and you enter a link such as the subscriptions page, the resulting page will be a "Not Found" page. Should this perhaps create a redirect to the login page?