Fighting comment spam

The site has the possibility to add comments, and after a few days, the spamming begins. I’m curious if the automated spambots are smart enough to do some math. The captcha I’ve created is very simple: just give the answer to “1+1”.

dr. Sybren A. Stüvel
dr. Sybren A. Stüvel
Open Source software developer, photographer, drummer

Related