Many commentators are comparing the smart grid with Web 2.0. The smart grid, like Web 2.0, promises to be interoperable, collaborative and interactive, and it will collect, share and distribute vast amounts of user-originated data. When it comes to privacy, not only are the similarities striking, but far surpassing in potential impact. Web 2.0 can absorb and send out data that a user inputs into a phone or a computer. Smart grid can do the same but also can potentially reach into the home and absorb data about every electronic event in every room in the house. It can translate that data into far more intimate profiles about a consumer’s daily life. Given these obvious parallels, it makes sense to look at the lessons learned from Web 2.0 to help predict the privacy pitfalls that might arise in a smart grid environment.