Someone is going to be deciding what to do with your data here, either the individual companies or the government.
Personally, I'd rather that the government made the call (whether it be to keep data private, use it, etc) than maintain the current situation, where we have to beg companies to maintain our privacy, and then trust them to continue to do so. Those of us who live in democratic countries elect our government, and the theory is that they're accountable. We do not elect corporations and private companies. As with Google's "Do not be evil," promises that our privacy will be maintained are often made graciously, and perhaps with the best intentions, If your government isn't accountable, you can replace them. If RIM, Google, or anyone else decides to abuse your data... what then?