In Site administration / ► Plugins / ► Activity modules / ► Assignment / ► Submission plugins / ► Manage assignment submission plugins / ► Online PoodLL submissions are not enabled by default.
Despite that, creating a new Assignment in Moodle 2.8, in "Submission types", although the checkbox is not checked, all the Online PoodLL options (PoodLL Rec. Type, PoodLL Rec. time limit and so on) are available by default and we can't actually disabled them.
Teachers not interested in using Online PoodLL may be confused by these settings.