One of the things that the Stack Overflow brouhaha demonstrates is that it doesn’t matter if a service was founded by people trusted by the community (Atwood and Spolsky) and was broadly community-led. If it’s a VC-funded startup, they will sell out their users at some point.
@baldur Yeah. Any time a startup brags about their privacy policy, remember said policy will last for the time it takes to go from the filing cabinet to the trash can as soon as its acquired.