If you have to pay for every KB or MB that you go over on your hosting plan, Bad Behavior may be the solution for you. By effectively blocking known link spammers and bots this script will effectively lower your bandwidth usage and take the pain out of your hosting bill at the end of the month. It is open source and works with Wordpress, Joomla, and any PHP based site.

Bad Behavior promises to never block search engine spiders like Google, Yahoo, and MSN while protecting your site and your wallet.

They have a blog on the site that discusses spam, link spammers, and the likes.

Bad Behavior

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