'Pufnstuf' - subtle drug references or just wacky kids stuff?

Well, as long as we're on a Kroft bonanza... While researching H.R. Pufnstuf for the Cass Elliot post, I came across this tidbit from Wikipedia:

Many viewers believe the show contains subtle drug references - for example, the title character's name "Pufnstuf" can be interpreted as a term for smoking marijuana (puffin' stuff). Although it is often said that the theme song of the show included the lyric "can't do a little, 'cause you can't do enough" which some people claim refers to the addictive nature of some drugs, the line was actually "He can't do a little, 'cause he can't do enough." Sid and Marty Krofft have both denied that there were any intentional drug references in H.R. Pufnstuf. Lennie Weinrib, the show's head writer and the voice of Pufnstuf, has said, "I think fans gave it a kind of mysterious code-like meaning, like ‘Ah, was Pufnstuf puffing stuff? Like grass?’ Was it psychedelic? Was it drug oriented? Not to us, it wasn’t." The initials H.R. stand for "Royal Highness" backwards, yet some believe that it actually stands for "Hand Rolled" referring to hand rolled marijuana. An episode involving Jimmy's birthday had Witchie-Poo arriving incognito and gassing party-goers with smoke from her saxophone, which rendered them giggly and helpless enough for her to take Freddy away without opposition (and with encouragement from Freddy and Jimmy themselves).