@galileogirl: A man I’ve just started interacting with online IS the only person with that name, so all the Google hits were about him. I’ve never seen that before.
My name is an old family name, so a whole bunch of geneology sites pop up, and very little that relates to me. My web moniker is pretty unique to me, so that shows my Fluther and prior Yahoo! Answers activity.
@seVen: You could go to the individual sites and check your Privacy settings. FaceBook is one example where you can set yourself to be non-searchable, and you can make all your content on there limited to certain people, if you choose. The sites that don’t allow you to set your Privacy should have their policies posted (and at some point, you checked a box stating that you agreed to that policy). Go through those and see if they have an opt-out process. And if they are breaking the terms of their policy, contact them and threaten legal action if necessary.