If it was a bust of folks using weed (or crack . . .recognizing arguable differences) would it be any different?
It's illegal and they busted folks. We could argue if those who were partaking were lieky the kind of fans who were detracting from other fans experience.
I drank under legal age but I didn't do it in a public place. As a dad of two young kids we just had a family discussion about whether we could take the, to the game (that's a mother discussion). Sloppy drunks was one factor in my wife's answer.