Thus, in libertarian heaven, all search engines are indeed private, so... everything you read and see and hear is subject to whatever the company owners collectively think you should. Tyranny, same as if they owned the roads you travel on.
"Sorry, My. Grumpy, but our manager informs that you are not welcome on Roads Numbers 456-780. Please remove your vehicle from our private property or we'll notify our private police force, which you'll notice have a laser battery pointed at you up above. And oh, yes, it seems you are banned on all competing roads in the area, just to give you a heads up. You must have got someone important angry over at corporate, ha ha. You know, watch what you say, watch what you do. Words to live by, indeed. We hope for your future patronage on the Richard Cheney Memorial Highway System, Incorporated. Have a nice day. Get out or get shot."