One minor issue in my worldbuilding that I've been struggling with is how alcohol and other suppressant substances are treated legally. In a world where everyone can use Magic, a bar brawl is a big threat that can potentially level villages to dust. Mage Duels and Gladiator Games are a thing in my world, the former being a literally universal way to solve problems, but those formal matchups have restrictions and accommodations attached to them. Informal Mage Duels are a problem, and alcohol seems like a likely scapegoat at the very least. How would a government that recognizes that access to combat Magic is essential for the health of society go about regulating the use of that Magic? How are Informal Mage Duels handled and punished? How is property protected against collateral damage? Is insurance involved? My setting is very modern so feel free to throw modern ideas at me so long as you explain them.