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.
Yet websites try again and again to load the facebook like button.
As per GDPR, which is in effect but not enforced until May, tracking me without explicitly and clearly asking me if that is okay is not allowed and anything else, like withdrawing service until I agree to be tracked, does not construct consent.
When I visit a new website I do not know if they have facebook like buttons. I have to load the page to check that and without a script or ad blocker I will also load the like button and facebook will track that.
At which point in that process did I consent to any and all scripts on that webpage leeching of my personal data?
Take that up with the websites, not Facebook.
Vast numbers of websites use Google Web Fonts which enables Google to track users. I didn't opt in to that so I just block it.
Visiting a website is not consent for tracking.
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?"
For this I suggest dynamic filtering[1], as this guarantees there will be no connection to sites with block rules, and block rules can be easily locally overridden in case it is needed for a specific site.
[1] https://github.com/gorhill/uBlock/wiki/Dynamic-filtering:-to...
When you access a website with facebook tracking installed, you are consenting to being tracked.
Bury it in long legalese isn't accepted either.