Re: Facebook's shadow database of info on you.
And just to add, in Germany it is recommended that you use the Shariff tools, from heise.de, to block social media content on your site, until the visitor explicitly turns it on.
It displays greyed out versions of Facebook, Twitter, LinkedIn, Xing etc. logos, with a slider next to them. The visitor can then decide whether to switch on each service individually, or leave them disabled. First when the visitor has conciously decided that they want to be tracked by one of these services are the official images, scripts and third party cookies loaded / allowed.
(German link https://www.heise.de/ct/ausgabe/2014-26-Social-Media-Buttons-datenschutzkonform-nutzen-2463330.html)
Biting the hand that feeds IT
