I thought this sort of personal cattiness was what got people banned?

FWIW, the only mind-altering substance that had any lasting adverse effect on me was nitrous oxide. Though I did make the effort to inform myself about the risks of these substances in advance.

Right now, the only one I really have to worry about is G&Ts. It probably wouldn't take many more to be fatal (quinine allergy is rapidly progressive). Bummer, that's something I miss.