With Britain having gone through its third general election in four years, the halcyon days of Cleggmania in the 2010 campaign seem like an impossibly innocent time. Particularly since Sir Nick Clegg, once the shining, soft-haired hope of sensible centrists, now works as a PR man for Facebook. His job is to explain to the unwashed masses why Facebook’s refusal to do anything about false political adverts is actually good for democracy.