Earlier quoted context omitted.
Firstly, it is not possible to opt out of facebook. [1] And they do indeed collect private data that we didn't choose to share (shadow accounts, third party website trackers, etc). Facebook have broken "actual laws". There are so many cases were facebook have broken the law. [2] [3] Also, please read up on Fallacy of relative privation ("not as bad as"). [1] https://boingboing.net/2017/11/08/involuntary-profiling.htm…
Regarding [1], it is possible to opt out of facebook: don't visit websites with Facebook like/share buttons. (This website, for example). When you access a website with facebook tracking installed, you are consenting to being tracked.
So people should know a site uses Facebook share buttons before opening it through Google search. Then, they should keep closing pages until they find the one that don't have share buttons. Then, memorize a list of "safe sites?"