Did you know that computers automatically analyze whatever you post on the web? Based on what you say, these programs aim to identify your interests, and they also index your messages so that they become searchable for anyone.
For Human Eyes Only is a Firefox plugin that lets you post in a way that prevents computers from analysing your messages. The plugin converts your messages into images in a way that makes it hard for computers to extract your message, while genuine humans can still read it. Your messages are hosted on a server of your choice – you can even run your own hosting service. Supported versions are Firefox 4 and above.