[janvidar]

I've always found this bizarre too, but then all alcohol is prohibited until 21 quite unlike other places. I guess someone has to enforce that, too ?

[kwhitefoot]

And there is an ABC store right next to the campus that specialises in cheap vodka.

[afarrell]

That is not generally enforced at universities.

[noer]

I think it depends on some combination the jurisdiction, university & location. It's absolutely enforced where alcohol & alcohol related crime is a problem.