I tend to agree with Rich about FB (hint,I don't have an account). Arguing Google does similar things is not a defense, that is like the kid telling his parents they shouldn't be upset he is vaping bc all the other kids are doing it,too. It also ignores that with google it is easier to protect yourself and your exposure is different than Facebook depending on how you use google's products.
Put it this way,FB's basic philosophy is they can do anything they want and then says 'well,it is legal'. FB does everything they can to probe what you are doing,even if you figure out your privacy settings you are exposed. Everything you post on FB is theirs,every message,every photo,everything is theirs and their basic business model is to exploit that. Tracking cookies basically is like having a bug planted on your computer, they are getting information on you and selling it, it is why ads pop up bc you wrote something in an email,you surfed for information elsewhere.
They also basically allow third party people on the FB world and allow them pretty much unlimited access to your data, and likely still are, Cambridge analytics was not a bug in their code (I know that for a fact, I know people who work for third party developers,FB openly told them they could get unlimited access to user data). If you go on facebook go in knowing that you are on their to be exploited and used, that it is designed to make it impossible to keep your information from others, that they deliberately make it so if you don't check constantly you lose what you want to see then to find it exposes you to all kinds of tracking and ads that are almost malware, you can't assume good intent and keep that in mind when using it. You can use a fake name on there, but because of their intrusion into your computer or phone, I guarantee you they know your real name,it isn't even difficult. I have friends (unlike myself) who are experts at things like big data and data mining,at how much 'metadata' is a joke in terms of privacy, and you get the point.
Take a look at how FB was founded,take a look at what they do vs what they say, and it isn't pretty,as are neither Zuckerberg or Sandberg,personally I think they are almost sociopath like in not caring about what they do
I am not saying FB isn't worth it, there are some great things on there, groups, companies have sites on there (though I try to avoid companies who only do facebook,if they don't have a website I try not to use them,not that a website can't hack you),just be aware of the potential cost of using it and that they not only aren't your friend, they also might be actively helping those who are worse. Again,this is true of social media in general and Google is no saint, but FB IMO is not worth the risk personally, and the convenience of knowing my cousin's 2nd wife is now an ex in realtime doesn't matter to me