help-old.squat.net/ prevent-spam-comments

Recommended discussion settings :

https://help.squat.net//prevent-spam-comments/Recommended-discussion-settings.png

Activate the Light Captcha plugin :

https://help.squat.net//prevent-spam-comments/Activate-Light-Captcha.png

And for privacy reason disable Avatars from gravatar.com :

https://help.squat.net//prevent-spam-comments/Disable-Avatars-from-gravatar.com.png