There is a difference between cockpit voice recordings and open, over-the-air ATC-pilot conversations. Let's not confuse the two.
For the cockpit voice recording, there is no reasonable expectation that the public can or should be able to hear those conversations. ATC-pilot communications, on the other hand, occur over unencrypted channels that do not require any special equipment to receive. Whether everyone goes out and buys a receiver to listen themselves or listens via a streaming audio over the Internet is a fine point and a technicality. Regardless of any law that may appear to restrict the activity, an action to enforce that law would unlikely hold up in any court of law. If communications were truly not meant to be disseminated then a reasonable person would believe that such communications would be encrypted or some attempt would be made to make them unavailable.
The purpose of this site is to largely provide an educational resource for pilots and controllers, and a source of entertainment for those who enjoy listening to the action and the art of ATC.
Dave