Buck, it might be a good idea to add the suggestion that members should mention "SPOILER" in their threads' subjects. Most of the people already do this, but for newbies, it's kind of hard to know about it without having seen one of these threads before.
I'll second that if it's coupled with a larger spoiler warning at the entrance to the message board.
"WARNING: Messages may contain SEVERE spoilers. We ask that all users post spoiler warnings, but realize that newer users sometimes will not. Proceed with caution."