“Over the years the distinction between public and private spaces has become obscured. Which is why Starbucks is finding it so difficult to insist that customers do not carry weapons while in their establishment. It is because over the last several decades a doctrine of public accommodation has developed in the law such that when some area is adjacent to a public sphere — a street or road or park — it no longer enjoys private property rights, the authority to determine what happens there.” (03/04/10)