Now you are exaggerating. We are only not allowed to discuss them. I've mentioned them several times in other threads without getting deleted or even warned. Only one thread in which we started discussing them was cleansed.
But yes, those were also among those I was referring to with the third point in my reply to @The Holy Bottom Burp.
Not specifically true, they are allowed to be discussed anywhere outside of the LHP DIR per: Attn: as of now, any discussion of the Order of the Nine Angles is prohibited in this DIR.
However, the caveat is: Rule 6. Illegal Activities, it's hard to talk about O9A without mentioning illegal activities - it's about the only thing that makes them interesting.