Klout operates under American privacy law, or rather, the lack of it. If you created a Klout account in the past, you were unable to delete it short of sending legal letters until November 1st, when they kindly added an “opt out” mechanism. More to the point, Klout analyse your social graph and create accounts for all your contacts without asking them for prior consent. It also appears to use an unwitting user’s Twitter or FB credentials to post updates on their Klout scores, prompting the curious-but-ignorant to click on a link to Klout, whereupon they will be offered a chance to log in with their Facebook or Twitter credentials. So it spreads like herpes and it’s just as hard to get rid of. Is that all?