User blog comment:DirgeOfCerberus111/Canon Expansions, Feasible?/@comment-3258762-20131006100312

I do not think that adding a canon character to your story or character description is much of a problem, it's when you start to make changes to the entire setting as a whole that things get out of hand.

The reason they made the IoB, it seems, were to avoid having to incorporate other factions on this wikia into their articles. However, nothing on this wikia says you have to do that. The galaxy is a, quite litterally, huge place, you can put your chapter/warband/xenos wherever you want and there is quite a chance they will never come across one of the fanon chapters.

What the IoB did was drive a wedge into the community where it gave the impression, regardless of wheter that is what the contributors wanted or not, that they stood above the rest of the community, which is always a negative thing, believe it or not.

I have a character who fought Dante in one-on-one combat and almost lost, I have had no problems with any NCF tags on him. Heck, Joc mentioned allowing Canon characters in one of his how to's. Sure, Joc might not be the one who has final say, but I feel the article pretty much tells how you should write if you are involving canon characters.