tl;dr – No, waste of time.
Let’s face it. The world is a cruel place, and there are far more awful people than awesome people.
This is one of those first world problems, and my solution for it. Should you follow your frenemies?
A frenemy is someone that is your “friend” in social networks but in real life is out to get you. They “get” you economically or politically but they aren’t out to kill you.
I used to believe that you should “friend” every one but I soon realized that my on-line presence soon became a node for opportunists to get up a rung higher in the game of status.
Now, I’m selective. There are lots of folks that will say to you in the face, “Hey, let’s catch up.” Or “let’s do lunch soon.” But they do not really mean it. There are lots of folks that are plain nasty. One person invited me out to lunch just to say that he perceived me as lazy despite working on weekends and at the time having #1 apps for their segment in the Apple Store.
Anyways, I am un-following these folks. I don’t care about using foursquare to avoid them. I don’t care if they’re talking to my boss. The key here is to stay as light as possible.