It's called 'regulation' and we have all sorts of it in place for companies on which the public relies.
As I mentioned, 'finding another' may not be an option for some people. Starting your own is probably not either. And I'm inclined to believe that when our taxes help fund things like phone lines, cable lines, and fiber optic lines that carry the signals, then yeah, we ought to get some say (mind you not all lines were subsidized by taxes but IIRC many were).
edit: And I want to be clear I don't care if a company limits your bandwidth, puts on caps, etc. I'm talking specifically about limiting your abililty to access sites/servers based upon their particular interests.