Facebook recommended that a psychiatrist’s patients friend each other
This is one of the many dark patterns that Facebook uses.  It simply does not respect any boundaries the user might wish to have in place...Install it on your phone? Anyone you have in your phone's address book gets to see your picture under "people you may know".Someone in your family joins Facebook and friends you?  Now everyone you are friends with gets prompted about whether or not they know your family member.Want to delete some pictures you uploaded to Facebook?  It's extremely difficult and they must be deleted one by one.Other than LinkedIn, I'd say FB is the prime innovator of UI dark patterns that exploit users' unwitting behavior for profit.The youngest generation of internet users gets this which is why they largely do not use Facebook.  Soon they will realize that IG and Whatsapp are connected, and will avoid those too.What's interesting to me is that the recommendations are fundamentally not useful. It's easy to look someone up by searching for their name without the privacy-invading helpful suggestions.