Do you like Green Eggs and Ham???
T4R
I think this would be a great edition to Bungie.net and it would help people "Stay in the dark." (even though they shouldn't be on the website if they were smart)
Example:[spoiler]Halo 2 has a cliffhanger ending[/spoiler]
This would hide the information until the spoiler tag was clicked upon, which would then show the spoiler.
I really think this would be a great addition to Bungie.net and you should really consider it.