If your website lets visitors sign up, join in, or add comments and reviews, then—in addition to the legitimate details you want people to contribute—you’re getting some garbage. Some of this garbage is sent by spam bots.
Spam bots post content that detracts from your website. Spam lowers your site’s perceived quality. Spam posts may include links that pull traffic to competing sites or trick your visitors into a scam. The cost of spam is hard to quantify.
Plenty of experts recommend methods to avoid spam. But in a series of user research studies, I observed that anti-spam measures impose a cost of their own. They can add friction that causes visitor abandonment and attrition. The cost of this is easier to quantify.
Some anti-spam measures impose more pain than others. I decided to assess and compare them. Continue reading “Reduce spam without hindering usability”