Why does the Tor Browser Bundle ship with HTTPS Everywhere? Surely if you're connected through a Tor circuit, HTTPS provides no extra security?
anonymity /= confidentiality you can stay anonymous while making sure anyone can read what you are sending. you can send confidential messages while making sure anyone knows who you are. you can also combine the two :)
That depends a lot on what you're sending. Tor stops people from identifying you based on your IP address, but you can still identify yourself by logging in on http://not-encrypted.com.