Not only is it anonymized, it's very useful. It helps provide essential data for bug fixes, especially for an OS and application software that rely so much on not breaking backwards compatibility.
How can you call anyone paranoid after all that we learned in the past decade?
> Not only is it anonymized
Oh so that's why Microsoft uses a hash of your mac address in multiple products. To make it more anonymous. I'm sure your unique advertisement id is also very important and efivars are only used to make sure your activation is legit.