10-09-2015, 05:26 AM
On registering, you get a mail with a link. Clicking on that link gets you back to a special forum page, with some parameter value. That way it is confirmed the account was created by a lifeform (able to click on links in emails) that has a valid email address (where you can receive mails on thread replies if you subscribe that thread) and not by a spam bot that wants to sell us tribbles.