I believe there is at least one instance where a CO is good to log his/her own caches and that is in the instance of a challenge cache (IE: DeLorme or County Challenges). The logistics of completing a challenge cache pretty much, at least in my mind, levels the playing field for all, with the logging of the final cache being a proprotionately small part of completing the overall entire challenge. So I see no problem in a CO logging a smiley, at least for challenge caches.