Can you imagine what it must feel like to be publically branded a pedophile? That's exactly what happened to the former Tory party grandee Lord McAlpine. Is it any wonder he wanted to clear his name. In the past, if your reputation was injured the law gave you the chance to sue for slander,or in this case libel. The problem is, how can you sue tens of thousands of people who use Twitter? Obviously you can't, and that's where the problem lies.