The spoiler thread was one of the biggest draws, I had at coming on this site. The discussion and speculation was very enjoyable.
People having negative comments in any forum is common, a lil arguing is healthy to a forum in many cases. Compare the posts for the actual chapter release thread and the spoiler thread, the spoiler thread wins.
The actuall chapter thread will just have initial reactions to the chapter. The speculation and discussion usually takes place on other topic specific posts on the manga forumn.