Before joining a thread that isn't listed as "Open"
If you don't want someone joining a thread, I also suggest listing it as "Closed" in the title. If you can't because of that damn "can't edit the title after you've posted the thread" problem, just ask one of the mods or admins. We would be happy to change it for you.
Re: Before joining a thread that isn't listed as "Open"I would say that when there is no "open" behind the title in the Free Zone or Mirrorworld stories, it should be clear and a sign of good manners, that you have to ask the others before.
I wouldn't like to have "open" or "closed" behind the titles in the Galaxy. So there it's Rule # 1 to ask in the storyboard before, because there are complicated plots often.