Your wallet name is a fairly easy way to track you across lots of places, which makes it easier to shove ads in your face.

Google can already track you across lots of places; they don't need a wallet name for that. In fact, advertising companies go to great lengths to be able to say that none of your data is personally identifiable to you, while at the same time getting as close to that line as is possible.

In other words, they know what sites you visit, who you talk to, what you order online, what times of day you're on, and plenty of other things - they just don't know your name. The thing is, they don't need to...