Others have pointed out that this is fallacious -- even on big services sometimes employees are creepy stalkers, sometimes they're malicious actors of other sorts -- but even if you ignore that on twitter you are a target of advertising and if you think they aren't slurping up all the data they can about you and storing it in a database somewhere, you're fooling yourself.

Anyways, down this logic path is an internet where we somehow put all our trust in megacorporations and absolutely none in our fellow human beings and I dunno about you but one of those sounds a lot more dystopian to me than the other.