Stop user to submit a web address on the very first comments on any post and send those comments to spam folder.
MP Spam Be Gone is the simplest, most effective Spam blocker.
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
防止垃圾评论插件,点击正确的图形提交评论,仿"Clickcha"(Click on the Right picture to submit comments,to prevent spam comme
O RLY Comment Spam Search creates a quick link to make sure comments aren't spam.