Why this police department's 'hilarious' tweet about 420 is actually super messed up

While 420, the unofficial holiday for all things weed started as a secret code between some teens, it's become so much more in the past few years.  As cannabis becomes more accepted in society as states move to legalize recreational and medical marijuana, 420 has become commercialized. Major brands and even police departments are piling on, but instead of celebrating, they're turning pot use into a joke, and it's not always funny. SEE ALSO: This weed company grows pot for your specific mood