Everything you have ever uploaded to Facebook and every interaction you have with Facebook is permanently recorded and effectively becomes Facebook's property. That is enshrined in the user agreement you are forced to agree to if you want to use Facebook. There is no opt out. They provide a nominally free service but you and your data are the product they generate a profit from.
If you don't like or agree with the terms and conditions, don't use Facebook.
The same terms and conditions apply across pretty much any internet service, so despite local regulations and controls anything you do or post on the internet will be archived somewhere and effectively be available to someone forever.
You have three choices, never use the internet, use the best encryption and security you can afford, or rely on the anonymity of the crowd. Even option one doesn't really help because other people may post photos and data concerning you.