Facebook CEO Mark Zuckerberg called for greater government oversight and even regulation of the Internet in an op-ed piece published last weekend. Zuckerberg, who famously built the social network by playing by his own rules, said it was time for government and regulators around the world to step up and help rein in the Internet. The main point was to regulate what he called "harmful content." Only by updating the rules for the Internet will it be possible to preserve what is best about it, Zuckerberg argued.