Personal freedom encompasses using alcohol or any other mind-altering drug and inflicting on oneself the consequent harm. "Personal freedom" to do only what the government deems nonharmful is no freedom at all.
The question has never been “personal freedom”
Then why did you bring it up, artless dodger?
but rather the overthrow of the moral codes of society at large
56% Favor Legalizing, Regulating Marijuana
So what?
How else would one determine "the moral codes of society at large"?
If Woody sits in his living room alone when he inhales, how is he affecting any body other than his?
So there may be some Woody willing to sit in his living room but they won’t stay there.
If he leaves, how will he affect any body other than his?
When the simplest of logic is too complicated there’s always the petty insult:
“Then why did you bring it up, artless dodger?”