Upon installing your plugin I received a WordPress warning message telling me the plugin generated 3 error type messages during activation. It went on to say that if I received further warnings about headers already being sent I should deactivate the plugin. Just moving from one post to another on my site generated the 'headers already being sent' messages so I have deactivated and deleted the plugin. Let me know if you get these issues fixed. I like the concept of your plugin.
BTW the WordPress plugin site says 3 people claim your plugin works. I assume those people are you and your friends?