Chinese spies created a fake Facebook profile of US Navy admiral James Stavridis and used it to cosy up to his colleagues around the world.
Hacker groups Anonymous and LulzSec are calling for a boycott of PayPal, following the prosecution of 14 people for allegedly carrying out DDoS attacks against the online payment company last year.
PayPal has ended its freeze on payments designed to help Bradley Manning, who's under investigation for leaking thousands of classified cables to WikiLeaks.
Flickr has admitted accidentally deleting a photo-blogger's account, wiping out his 4,000 photos at a stroke.
An unsuspecting healthcare worker was kicked off Facebook last week - for having the same name as Prince William's fiancee.
Kate Middleton, 29, discovered she'd been booted out of the site late on Thursday night after repeated unsuccessful attempts to log in. When she investigated, she found that Facebook had acted on the assumption that she had registered under a false name.
The Israeli government has bought the @Israel Twitter account from the owner of a pornographic website.
Google has introduced a new feature to notify Gmail users of potentially "suspicious" account login activity.