Lets move from the street to 'private spaces'
You attempt to go to your local grocery store. They use 'Google Identity' which they are perfectly allowed to as a private business. You are accused of sending spam by Google (who the hells knows why, they never explain anything) and you are barred access.
Being the staunch libertarian you are, you leap over the public roadway afraid of catching communism if you touch it and go to the grocery store across the road. It turns out they are using 'Amazon Identity' and via an information sharing agreement with Google (private businesses can share information about you, right?), and you're also denied access to that store.
You'll go to another store, right.... Oops, turned out after we got rid of monopoly laws there are only two different stores in your community after consolidation of the industry. Luckily for you there is a toll road that you can take a 30 minute drive to another place that uses a different set of identifiers to let you in.
We busted monopolies and company stores years ago because businesses harassed and murdered people left and right!. Have you forgot the history of the Pinkertons, or are you just blindly ignorant of that part of US history?