Well here, you can create subforums of
contests, spoiler's info, and tekteks.

About contests. Everything has to be on topic.

Well, here you can do contests with relevance of D.Gray-Man.
Example. Tektek contest.
Trivia.. (I guess..)
Best drawings of people in D.Gray-man.

Spoilers info. (make sure to put that in your subforum.)
Examples razz ut information.
Maybe thoughts on them.
Details~
Anything that you can think of.
New chapters.
New episodes.
The 411 on the characters.

For tekteks.
Offer to tektek (if you want)
You can like.. sell.
Buy tekteks.
Or just tektek for free. Etc.