Why is that a problem? If I visit ognarb.com, what right do you have to tell me "You aren't allowed to use that fact for developing a profile about yourself"?

Why is that a problem? If I visit ognarb.com, what right do you have to tell me "You aren't allowed to use that fact for developing a profile about yourself"? You send me a bunch of data, including headers, and I'm more or less free to do with that what I want within the privacy of my own browser. I don't have to listen to any of your headers if I don't want to.