Why Anonymous Users Can't Create Accounts
This web site is configured so that only users with administrator privileges can create user accounts.
This policy wasn't set to be annoying or maintain exclusivity. Web applications that allow anonymous users to create accounts tend to quickly get overrun with spam. A few years ago, in unrelated attacks, the Spartan Robotics forums and the Los Altos Robotics website were both filled with bogus accounts by bots. These bogus accounts were used to post the kinds of not-exactly-clean content normally found in your spam folder.