I have about a dozen FB friends (boast) but most of them are relatives.Two of these relatives are addicted to FB and post just about every detail of their lives, if one is not boasting about her perfect children she is posting selfies and waiting for the comments ''You look lush'' etc.
My ex DIL defriended me after she and DS2 separated.I had to block her mother when she posted untrue and malicious comments about me and my family.It was then I discovered the evil side of FB.
I stay on it as I am in some special interest groups.My DGD1 and the family of my late sister live in London and as I am in the north east I find FB is the quickest way to keep in touch with them.