Hi
@OCTOPUS - it does look like you've got registrations enabled on your blog. Wordpress has a default location for its user registration page - yours is here:
http://www.withboys.com/wp-login.php?action=register
(Try visiting in a different browser to what you usually use, or use youre browser's Incognito or Private Browsing mode. Wordpress will probably redirect you if you are logged in already.)
It's easy to fix. Just log into your admin Dashboard, an click 'Settings'.
About a third of the way down the page there should be an option called 'Membership'. Make sure the 'Anyone can register' is NOT ticked, then save the page.
Once you've done that try visiting the page that I posted the URL to above (again, in Incognito mode). Hopefully the page should tell you that you can't register.
Let me know how you get on