Partially, I guess – I remember once when I was a kid my father having to confront a drunk seated behind us in the lower west stands, spilling drinks on us, acting like a jackass, etc.
But it's much broader than that. It is comparable to the idea that there's too much skin on TV. A little skin is OK, healthy, happy, normal, just the celebration of human vitality and beauty. But too much skin is the greased edge of a perilous slope that leads to fatherless children, angry feminists, gay marriage and men playing girls sports. (Many people will laugh at that!) The same goes for alcohol and drugs in society. Alcohol can be a pleasure – but there's already plenty of alcohol around and available. It's good for there to be places of public gathering and accommodation, moments of communal joy, where it is, at least, not officially promoted.