WP No-Bot Question

This plugin is just a very effective yet simple plugin which adds a question to the comment form that blocks most automated spam-bots by making them answer a common sense question. For optimal effectiveness, you should add multiple questions so that the spambots can’t « memorize » the question and answer. The plugin will display questions at random to prevent the aformentioned memorization. Multiple answers can be added per question to account for variances in answers. (e.g. « five », « Five », « 5 »)

Plugin homepage: http://www.compdigitec.com/apps/wpnobot

Please drop a comment if it works for you, if you found any bugs or if you have suggestions/ideas for this plugin – complaints welcome!