Or, if you do care, you are being stupid. So that e-mail address doesn't exist. Suppose you are applying for a job, and your employer finds you have been posting a lot to talk.politics.drugs or alt.2600 . Other choices we make we may not be aware of. If you are going to get on the Internet, you are probably going to leave muddy footprints all over the house.
Privacy involves trade-offs.
But that doesn't mean your web browser should make all your Internet privacy choices for you. In order to understand this better, your first step is to get a browser privacy check at the Center for Democracy and Technology. Then use the back button on your browser to return here, after you have explored that web page. Maybe some of the information wasn't quite right. But remember, it didn't take very long to get, and they weren't trying very hard.