A few papers, including the Daily Telegraph, report that an enterprising company has launched a product that will prevent people using Twitter while under the influence – or as it will be henceforth be know, getting twatted and tweeting. The Social Media Sobriety Test requires users to complete a series of tasks before they are permitted to post messages on websites – including dragging the mouse in a straight line or typing the alphabet backwards. Some of us can't even do that when we're sober, of course.