[1] Motivations for posting anonymously include a desire for privacy or fear of retribution by an employer (e.g., in whistleblower cases), a government (in countries that monitor or censor online communication), or another group.
Most fall into the following major categories: Recently, anonymous blogging has moved into a more aggressive and active style, with organized crime groups such as the Mafia using anonymous blogs against mayors and local administrators in Italy.
If the device is still active at the end of the lease, it can renew its connection and keep the same IP address.
While this does not prove that a specific person was the originator of a blog post (it could have been someone else using that customer's Internet, after all), it provides powerful circumstantial evidence.
Character frequency analysis takes advantage of the fact that all individuals have a different vocabulary: if there is a large body of data that can be tied to an individual (for example, a public figure with an official blog), statistical analysis can be applied to both this body of data and an anonymous blog to see how similar they are.