An anonymous posting on an Internet website defames and destroys a professional reputation. An anonymous entry on an Internet chat-room reveals confidential pricing information. A series of anonymous e-mails threatens physical harm to the recipient. All of these events pose tangible threats to the personal and financial security of the target person or company; all demand immediate remedy; all found legal causes of action. Happily, our robust and adaptive legal systems provides means of obtaining evidence about the identity of the sender, despite the anonymous source and technical complexities, from non-party sources,
