I'm speaking for you, me, any registered users of this forum, and the billions of people worldwide using the internet every day. You don't own a single post you make using this software, MacRumors does. You can't delete your account. You signed a lengthy TOS to even get here, gave up your e-mail, etc. Not just a forum - Twitter, Photobucket, Facebook, Instagram, basically any app requiring an account. And all the ones you can just link with Facebook, or some other means of social media? Now they already know who you are.
If en masse people cared about privacy...we wouldn't have what we have today, companies generating billions of dollars just on our data alone.