Aaaah, sourceage! (http://en.wikipedia.org/wiki/Office_of_National_Drug_Control_Policy#Paying_for_embedded_anti-drug_messages_in_television_shows) In related news, Reptile Boy. But yeah. I think the morality play aspect of the show had to be there for network profit standards, and of course it's what we're so inured to here it's what we expect to see, but as you illustrated so well above, the show still managed to get around that and tell a fun story that fit the tone and arc of the series.