It's claimed that Roddenberry smoked reefer, big time, so this has GOT to be his slyest reference possible to slip passed the ultra strict censors of network TV at that time.
Hmm...I dunno where this was "claimed", Roddenberry was quite the opposite, he detested smoking of any kind, during TOS he banned the likes of Shatner, De Kelley and Jimmy Doohan from smoking on set between takes,
In fact Roddenberry's view of smoking was so disaproving...
This is nonsense. Roddenberry was a heavy smoker during the years that TOS was produced. In fact, years later when he proposed eliminating alcohol from "Star Trek Phase II" (yeah, he didn't come up with that idea just for TNG) he even made a point of the fact that he banned smoking from the screen in TOS despite his own smoking habit.
Roddenberry objected to portrayals of smoking and drinking in Trek on grounds of plausibility - his assumption that we'd continue to become saner and healthier as a society and as individuals in the coming centuries - and had nothing to do with
morality or with his own proclivities - read even the most fawning of biographies (that would be "Star Trek Creator") and you'll find at least passing accounts of his drug use. The further removed from GR's circle of adulation the writer is, the more extensive the catalogue of his indulgences becomes.