Bad Behavior is an excellent ‘profiling’ plug-in that deters most spam bots and attacks on web-based scripts, especially blogs, wikis, and forums. It uses a very detailed and sophisticated combination of checks and algorithms to create a ‘spammer’s profile’ and if a visitor to your site fits it, it’ll block them.

The algorithm is so good that there are almost no false positives, and together with a decent spam plug-in like Akismet or Spam Karma 2, you’re blog will be forever clean. But it has a problem with Opera. Most builds of Opera trigger a false alarm, leaving your blog reader-less, especially with the release of Opera 9, an excellent browser in all rights, but there is a solution. Continue reading →