SPAM in my guestbook

I was getting spammed more than a dozen times each and every day. Someone posted a comment last night calling themselves "SPAM" and saying that they were going to hit my guestbook hard unless I blocked them. I've been coming here looking for a solution to my spam problem for many months and noone has a solution. I password protected my guestbook, but they still posted. I got fed up and deleted the entire guestbook today.

There are plenty of anti spam solutions posted in these forums but there is nothing you can do against a moron who manually signs your guestbook.

Move to Lazarus and moderate the guestbook. Since I did this, the spammers I used to get are gone now.

I download the image verification.zip from carbonize (http://carbonize.co.uk) and that tool work fine.
thanks carbonize!