First they came for the plastic bags, then plastic straws. Now California progressives want to ban paper receipts. Like so many other liberal crusades, the fight against paper receipts is cronyism masquerading as green virtue. California’s good liberals see a green villain behind every corner. If something doesn’t kill sea turtles then it will likely give you cancer. The state banned single-use plastic bags in 2016, which was followed last year by a prohibition on plastic straws in restaurants. Warnings are required on products that regulators deem even remotely carcinogenic, from potato chips to aspirin. The latest scourge is paper...