Recreational marijuana use is now legal in 11 states. It is legal for medicinal use in 33 states. In many of these areas, marijuana use is less frowned upon than single use plastics.
Prior to this trend toward legalization, marijuana has been illegal in the United States for the better part of a century. The Federal Government still designates cannabis as a schedule 1 drug. So while a state may have legalized recreational or medicinal marijuana, it remains illegal under federal law.
Criminalization, of course, implies consequences in the form of arrests, fines, and imprisonment. In practice, these implied consequences have been disproportionately applied to minorities.