The only times plots and enemies should be involved is on quests, and it's already been agreed that quests will take place through group PMs between the involved characters. Hopefully soon enough we'll get some people out on quests and there won't be so many people in the guild hall, then it won't be so chaotic. Otherwise the general idea for posting is that if somebody does something that's directed at another character, you need to let that person (The one it was directed at) respond before you respond to the action yourself.