There are two movies named Reefer Madness. One is very old, and is an unintentionally hilarious film describing the "dangers" of marijuana. (Spoilers: it will make you kill everyone you love.)
The second movie is from 2005. It is a musical spoof of the original. Initially, Alan Cumming informs us that marijuana is "creeping like a communist, it's knocking at our doors, turning all our children into hooligans and whores!" It gets more awesome from there.
Endorsed by SkyeBerghel and SarahLoeb, who have been known to periodically sing "TURNING ALL OUR CHILDREN INTO HOOLIGANS AND WHORES" loudly for no reason.