Weisberg put his finger on the underlying trend: "Because Democrats hold power at the moment, they face the greater peril of paternalistic overreaching." Today's morality cops are less interested in your bedroom than your refrigerator. They're more likely to berate you for outdoor smoking than for outdoor necking. It isn't God who hates fags. It's Michael Bloomberg.
In [Daniel] Engber's case [see here], the provocation is scientific. To justify taxes on unhealthy food, the lifestyle regulators are stretching the evidence about obesity and addiction, two subjects on which Engber is burdened with contrary knowledge. Liberals like to talk about a Republican war on science, but it turns out that they're just as willing to bend facts. In wars of piety, science has no friends.
This sort of paternalism actually isn't so new, but it's a good thing folks like Saletan are beginning to take notice.