I think people don’t realize that when they make all of their posts public, all of their friends are forced get to see all of that person’s OTHER friend’s stuff when they “like” or comment on it. So I have seen boat loads of private pictures of people’s children, death bed photos, and other things that are not meant for me to see. Also, when people make all their posts public, every flippin’ comment or like shows up in my newsfeed. I don’t know any of those people except for one or two that might be my mutual friends. The other 50 or 100 people have no relation to me whatsoever, but I get to see every one of their posts and their respective kids and dying relatives.
I try not to “like” or comment on any public post, even if it’s by a friend who I like, and even if the post is interesting. Why? Because all of MY friends will see my likes and posts on total stranger’s posts, even if the post has nothing to do with them at all. If I wanted to share that info with my own friends, I would have done so in the first place. People do not realize that when they “like” or post on one friend’s “public” post, everyone in their own friends list gets to see it, whether they want to or not. Whether it should be private from those people or not.
I NEVER make my own posts public. You are asking for trouble, and risking your own privacy, as well as the privacy of your naive and unsuspecting friends who have no idea that dying Aunt Molly is being seen by every one of your friends, and likely you are inviting viruses that are passed along. Plus, it’s just a pain in the ass for all of your own “friends.”