I have been getting a crap-ton of comment spam in the year that I have maintained this site. Sometimes I get more than others, but it's always annoying to have to delete damn ads of the likes of banks, money scams, masters degree programs, and of course porn, to name a few. So I am finally going to do something about it and I have added a CAPTCHA to my contact and comment forms. Now when someone wants to post a comment, they will have to add up 2 numbers and enter the answer in a field. This is to check if the person trying to submit the form is human and not a robot trying to dump their crap in my front yard.
Sorry for the inconvenience, but it should be a fun little experiment to see if robots can do math too.