I'll love to explain the points you keep avoiding in the discussion and you brought up the TLDR; for "I would like to speak to your supervisor." when I do not believe I am eligible to permit someone to MESS with the atmospheric. Alberyk explained it to you.
Let me point this out, you were mainly banned for:
1. Messing with Atmospheric System (Nitrogen Oxide [Laughing/Sleeping Gas]) without Moderator/Admin's Permission TWICE in one shift. Having two crazy people who has low RP, and such does not exempts you from the rules. You should have adminhelped. It doesn't matter if it's anesthetic or not.
2. Jumping right ahead to gassing without calling for Security.
Generally, people were warned for this before. I am looking at the notes, this is not your first time doing it.