Aug 01 2006
Fighting blog spam with arithmetics
After reading about Norm’s move to math CAPTCHAs, I decided to try it myself. I actually did not have to implement it myself, as there was already a WordPress plugin for this: Did You Pass Math?.
The result is that I have not gotten a single spam comment since I installed it. This goes to show that visual CAPTCHAs and all their accessibility problems are not the only solution to stopping spammers.
