For everyone that needs a clear account of this issue, unbiased, uncomplaining, not blaming 343i, etc, please read below. Please use this to help with the issue.
UP FRONT: I understand people are "boosting" and getting achievements playing with their "little cousin that sucks" and getting EXP BANS. Note that EXP BANS are not permabans.
1.) I had the Map Pass, I know this because I played with my scanner helmet several times.
2.) When I downloaded the map pack a few days ago I was like, "Hmm... this seems funny that its 'free', must be related to me having the map pass. I bet everyone without the pass is paying for it".
3.) I ONLY played SPLIT-SCREEN on Harvest (not matchmaking, NONE whatsoever) with another XBOX live account (GT AYREEEZ) that was idle, i.e.: not playing the game, so that I could practice and see the spawns. I DID NOT ENTER A MATCHMAKING GAME WITH ANY OTHER PLAYER TO BOOST (which would apparently have resulted only in an EXP BAN from what everyone is saying).
4.) I have no other permabannable issues that I am aware of (I'm not naive, I could have done something stupid, but I doubt it considering I have never been banned before and don't rant sexist comments or hack).
Everyone following me so far? Paying attention to the caps locked terms? Here's the issue I had, considering all of this:
I was permanently banned a few minutes after playing the split screen game in question, both accounts (BARBS v2 and AYREEEZ), after subsequently playing a game or two in matchmaking, alone. The account named AYREEEZ was not even signed in, nor does it have an active gold membership that would allow me to use it online. The fact that both were banned is what allows me to blame the split screen game
Thanks for reading, and I hope that this helps the community, the web, and 343i in understanding this.