You can archive one or more subjects in Ferretly by going to the subjects page and choosing the subjects you want to archive. Archiving a subject will remove all of the subject's posts which weren't flagged as a result of running the background check. It will also remove the subject from your subject list.
Note: When you unarchive a subject only the flagged posts will be visible in Ferretly.
You can also choose to view archived subjects in your subject list by checking the "Show Archived Subjects" in Settings.