Journal friending
I realize this is partly my being horribly OCD on some level, but I get really frustrated when people don't keep their lists updated.
Especially if it means that people will miss another character updating just because they haven't gotten around, or never got around, to adding that journal. Or people will have characters added who were dropped MONTHS ago and yet haven't added anybody new for weeks.
Considering it's not so hard to keep lists updated with the admin console and whatnot... idk, maybe every once in a while have some kind of reminder for people to keep their flists updated? I guess technically the 'add/drop' post is supposed to be that reminder, though...