re: Father, son ejected from AZ Cardinals game

Here's basically what the Louisiana law says

-you can drink underage if with parent/guardian at a private non-alcohol selling property (ie. people's houses. Doesn't even have to be their house)
-you can drink underage in a private, non-alcohol selling property WITHOUT parental knowledge or presence (same thing, you parents don't have to know about it though)
-you can drink underage in a public, alcohol-selling property with parental knowledge and presence

Pretty much, the only time you can't drink underage in Louisiana is in a public, alcohol-selling property without your parents. So you can't go to a restaurant without your parent/guardian and drink- everything else is fine