Disable "Networks Detected" message?

[anticowboyism]

I keep getting these messages in the System Status area whenever my wifi detects a network. It's very annoying, especially since practically all networks it detects are protected! I want to use wifi occasionally when at home and at work, but for the rest of the time I don't need to be reminded that there's wifi in the air. How do I disable the notifications? There has to be some registry setting... Thanks!