Formerly ~private personal info now freely available

The site www.familytreenow.com makes formerly "private" (public for a fee) personal info now freely available. Like your address history, living relatives, or other connections.

It seems like a good idea to opt out, assuming the site managers respect that, but also that this kind of thing will become common over time, and regular people will need some kind of strategy adjustments. I'm curious what you have to say.