[Michael Adams (mdawaffe)]

There is currently no way to delete a forum without deleting it directly from the database (that is, using something like PHPMyAdmin).

Tags can be removed from a particular topic by clicking the little x next to the tag in question.

Tags can be completely deleted from the entire site by clicking the tag name, scrolling down, and clicking Destroy Tag. You must be an administrator or key master to destroy a tag.