At one point I was getting spammed through a contact form ( http://hhgproject.org/contact.cgi http://hhgproject.org/contact.cgi ) so I added two forms of a text

At one point I was getting spammed through a contact form ( http://hhgproject.org/contact.cgi http://hhgproject.org/contact.cgi ) so I added two forms of a text based captcha---the first one is a single question (that anyone visiting that particular page should know) and a hidden field (via CSS) that should not be changed. I haven't received a spam since.