He was talking about marajuana induced paranoia on a thread about weed. You are, as usual, looking for an argument that just isn't there. But I cannot speak for the other poster so you'll have to ask him.
I'm all for a bit of drug use. I have tried most things in the past and don't rule it out again in the future. I have had, on the whole fairly positive experiences with such things. I do however believe that the state a healthy human mind is in naturally ie, not under the influence of mind...