The world will not end if we start getting our drinks in brown cardboard boxes rather than brown paper bags. Then again, maybe the point here is that many folks still feel subconsciously that drinking should be difficult. That going to the package store to pick up a bottle or two should take some effort. Come to think of it, sin is definitely involved here. Sin taxes, in particular.
Governments are fond of their taxes.
That bottle of wine you order direct from California won't have a tax stamp for your state on it. Which implies sin without taxation. True blasphemy in the hallowed halls of any legislature. Send us a nickel.