Activated Captcha

My Blog is now in the search engines available. So I got today a lot of spam. I activate now a Captcha for comments and reply’s. If you cant read it, push refresh on Captcha. In the moment I approve every post manually. I have no problem if you like to put your own private website in this post.
If you like a own user for this Blog, write me a mail with the reason why. Registered users don’t need to input the Captcha.