When you say that "one should be in control of his/her contributions"... you realize that you are "publishing" these contributions, right?

I understand where you're coming from in wanting that control, but I would encourage anyone who feels that they should be in control of what they put on the internet to meditate on the word "publish."

You would laugh at Stephen King if he suddenly demanded that everyone return their copies of the Dark Tower, right? At one point he made the decision to "pull the trigger" so to speak, and publish that work. Like any trigger with lasting consequences, once you pull it, they are there.