Of course there are rules, and people have to behave and follow the rules, but on a MB that doesn't have a dedicated spoiler MB, accidents are bound to happen, and happen often.

Thing is, if you're sensitive to spoilers so much that reading prologue spoilers pisses you off, then the last place you ought to be around is a WOT discussion board if you don't intend to read the new material in a timely fashion. That's as much your responsability as it's everybody to respect posting rules.

Personally, my view is more that if something is released, then it's released. If you don't want to or can't read it now, and don't want to read spoilers, than it's primarly your responsability, and your duty not to whine about spoilers. Otherwise you just make yourself an hinderance to the discussions of other people who have read the material as released. Spoiler rules should be strictly to cover illegal leaks and so on, in my book. For released material, they're just to serve the wishes of people who ought to be responsible and not stay around if they don't want to see spoilers.