Opening different threads for subs and raws, sounds quite pointless as well. Similar threads just because some people are about a week ahead. (and there are also people who can watch both raws and subs~)
And, even if you do this, it still doesn't mean that all the spoiling would stop. There are still those who have read the manga, and can spoil the fun even for those who watch raw-animes. And there are still those, who are far behind with the anime and manga, and can consider pretty much anything as a spoiler.