The drinking age in lousinana is 18, this makes it the only state in the united states with the drinking age of 18. 

Make no mistake about it: Louisiana marijuana laws are among the strictest in the country. While some other states have taken the lead and experimented with marijuana legalization and decriminalization, marijuana remains largely banned in Louisiana. Though the Legislature legalized marijuana for medical purposes in 1991, there's no mechanism in current law that allows for the legal dispensing of the drug. Doctors can legally prescribe it, patients can legally use it, but there is no middle man.

Open carry of firearms in Louisiana is permitted without a permit, as long as the user is of at least 17 years of age and legally able to possess a firearm under state and federal law. Louisiana has state preemption of firearms laws, except for local laws passed before July 15, 1985.

Laws broken-

Possession and use of drugs.

Consumption of alcohol.