User:127.0.0.1 is a user shared by everyone using an anonymous Tor-encrypted connection.
These users are visiting this website using the .onion address http://3fa7ihmfwq77rmgb.onion/
This is possible because this website is available as a location hidden Tor service in addition to being available as a normal Internet service. It is obviously very easy to find the IP and location of this server because it has a normal DNS address, but location hidden Tor services have another very nice property: End-to-end encryption.
 Tor end-to-end encryption vs. Normal SSL
Tor end-to-end encryption vs. Normal SSL, what's better?