Since you still seem to think I should have been denied:
1. You can see from the PM's that nbm only contacted me because he had been trying to get hold of Taal, his cabal's ap, for months without success, to give the mask. When he contacted me he didn't know for sure I was Tsal. He had already decided to give the mask.
2. While we talked about Shadow plane it is also clear from the PM's that we didn't want to leverage any of it against other players. In fact, the reluctance to share its secrets applied to me too. Is been in the cabal for ages without being shown the secret and I was only shown when scarab gave his blessing.
3. I used no gear from the plane outside of the plane.
4. The guy that claimed I lied to cover it up was failing to understand that I knew he couldn't possibly have been told to use the XXX by needs, like he claimed, without also bring down how to use it. So I knew something was dodgy. Ooc, I also knew the imperials that cheated their way through hell would look to do the same in Shadow plane, so I was watching of for anyone that send to be an imperial spy.
I didn't pk with jeede other than one raid where we were the underdogs. I only shares stuff in the PM's that could effectively have gone in the in game note system. Except as an ap you can lose everything while distracted by note writing.

So what exactly would I be banned for?

Compare this with people coming out with all the hell gear/Tatt's/pk support and Imperial political support.