“The Wikimedia Foundation believes that, working with checkusers, stewards and vandal-fighters, it’s possible to figure out a way to protect our users’ privacy while keeping our anti-vandalism tools working at-par with how they work now. Hence, it has decided to work on shielding IP addresses from our wikis — including restricting the number of people who can see other users’ IP addresses, and reducing the amount of time IP addresses are stored in our databases and logs. It is important to note that a critical part of this work will be to ensure that our wikis still have access to the same (or better) level of anti-vandalism tooling and are not at risk of facing abuse”
Source : IP Editing: Privacy Enhancement and Abuse Mitigation – Meta