HTTPS

Although https is turned on for stallman.org, it is only for this page. The main reason to use SSL for web pages is to protect information between the client and the server. As the data on the server is mainly static text files and with the only data coming from the client is the occasional search term, this is not particularly useful for stallman.org

What https does not protect the information about what toplevel domain you are accessing (which DNS would probably give away anyway) or even how much data your are accessing (which means that on a site that is mainly static text, an attacker could figure out what text someone is looking at if they can snoop on the network traffic even with https). https only protects the data that is in transit. To avoid people being able to tell what pages one is looking at, something like Tor is needed.

For more information on this and a better discussion of it, see the FAQ for the EFF https everywhere project.