Twitter feature request: Protected updates options

One thing that’d be really useful for Twitter: If you could signal somehow why your Twitter updates are protected. Some folks do it because they prefer to communicate within their circle of friends. Others do it so they can monitor who subscribes to their tweets – which is the only way of making sure that your tweets’ RSS feed doesn’t get syndicated all over the web. If there was a way to say what your motivation is to keep your tweets protected it might spare a many a moment of social awkwardness, non?