Regulation is a taboo subject in tech, an industry that so far has avoided the kind of oversight that governs finance, energy, and other major industries. But companies like Amazon, Google, and Facebook have an enormous amount of influence over everything from how we shop to how we communicate. Concerns about this concentration of power have recently led to scathing op-ends with headlines like "Silicon Valley is Not Your Friend", and prompted some lawmakers to push for stronger regulation. The companies, on the other hand, insist that they can regulate themselves. We dig into it with five experts from media, government, and tech.