>> Probably the First Amendment had something to do with it. <<
Oh, sure, you’re free to say, “Hey, Look at me! I’m committing a crime!!!” But if you get busted for that crime, don’t complain that it’s your first amendment rights which were violated; it’s the crime that’s at issue, the foolish announcement just led the police to the crime.
By the way, from a natural-law perspective, I don’t believe that 18-year-olds drinking is a crime. I lament that raising the drinking age drove people into fraternities, where binge drinking absolutely was an epidemic in the late 1980s. Previously, any few freinds could share some booze in their dorms, or go to a bar... after they raised the drinking age, they had to put up with all that frat crap.
Don’t tell me there wasn’t binge drinking. The floor of the dorm halls were coated in puke on any given Saturday morning... and everyone was saying, “oh, man, I got so f***ing wasted!!!” Not to mention the drunken screaming out the windows, the stench of bongwater...
You didn’t have to be in a fraternity or sorority to binge drink or get high until you puke.
It was a general college experience.