Previously, on Awful, we considered whether David Chapman was an LSD user. My memory says yes but I can't find any sources.
I do wonder what you're aiming at, exactly. Psychedelics don't have uniform effects; rather, what unifies them is that they put the user into an atypical state of mind. I gather that Yud doesn't try them because he is terrified of not being in maximum control of himself at all times.
He's not wrong. Previously, on Awful, I pointed out that folks would have been on the wrong side of Sega v. Accolade as well, to say nothing of Galoob v. Nintendo. This reply really sums it up well:
I think that the turning point was Authors Guild v. Google, also called Google Books, where everybody involved was avaricious. People want to support whatever copyright makes them feel good, not whatever copyright is established by law. If it takes the example of Oracle to get people to wake up and realize that maybe copyright is bad then so be it.