1. Your password will be multiple hashed and saved in database, this site doesn't save plain text password.
2. If you decide to register, your personal site, hobby and hometown can be seen by other users, but these items ain't necessary for register.
3. As a user, you can comment and use some useful tools such as pastebin... You can find the entrance at the bottom of the page after login.
4. If you have some questions or find some bugs, you can leave a message on the "board" or email me, thanks^_^