From my perspective, I'm really unsure how you or your friend failed to immediately spot the big bold text on the wall that says unless you are a member of UA, you shouldn't even be in that room.
The first instance of you hitting the Pantheon buttons happened when one of the broadcasts were played, and you and your friend immediately left the game afterwards. Second time, you join back and decide to hit the button to activate the horns, which is when you got caught.
When speaking to you in the sit, you seemed to be feigning ignorance and was just not answering any question that me and Jack asked.
If your game completely crashed and shut off, then the logs would state you timed out, however it states "disconnect by user", which backs up the LTAP ban.
You have accepted some responsibility in your appeal which is appreciated, however I still feel that the LTAP reason at the very least is still justified. Another member of UA will decide on this appeal outcome.