Uber and Airbnb have undergone regulatory setbacks lately. But as regulators continue to crack the whip, there is little sign they will be able to stem the tide of popularity for these sharing services. Should the very idea of regulation evolve? It should not, at least, exist to protect entrenched industries and shut out competition. But companies like Uber, who have very strong Libertarian streaks, may have to make a move too. Will both sides learn to play together?