People seem pretty good at not giving away the whole shebang with most quests, particularly the main quest, but it seems that people pretty commonly give away details about quests even if they don't give away the whole thing. Maybe we could be a bit more careful about this? If the thread's about something that might potentially have spoilers but you put in the main forum, maybe a "possible minor spoilers" warning?
Or if you add a post, double-check and make sure you aren't giving away some little bit of a quest that somebody might wanna figure out for themselves. Spoiler-tag the things and anybody that reads it has only themselves to blame.