God, does Uber have to do everything around here? Since Blackjet, the Uber for private planes, has crashed and burned, the company that once let you hail cars with your smartphone is temporarily letting users do the same with planes.

Now that it's obvious Uber is trying to put conventional taxis out of business, the people who drive those cars are more worried than ever. And in Paris, where Uber was recently legalized, that worry just spilled over into street violence.