My BIL unfriended me, my DH, and his 2 other sisters after our argument about his "immoral" use of charity fundraising tools for his ill daughter, when he is building a house bigger than mine and driving a 75K car. I noticed I was not getting his posts linking to obnoxious blog after a week or two. Then, a couple of days ago, my DH was digging around the net and found that his fundraising site had been taken down, and redone with no names, just initials.
Maybe our advice about privacy and protected medical information got through. You would not believe the stuff he was publishing out there.
I have hidden a couple of people or restricted their posts to "just see a few."