Always check Snopes before you post the latest viral chain memetic agent. Quest. Thing.
The misinformation du jour relates to having to post something on your Facebook wall  to keep the company from appropriating your pictures, posts, etc. and using them for their own nefarious purposes.
Needless to say, there are a lot of people doing exactly that. They are also encouraging others to do so, too, despite the fact that... well, it's useless. And annoying. So, you know, don't do that.
Besides - Batman disapproves, and you don't want to be on Batman's wrong side, now, do you?
 Yes, yes. I know it is a "timeline" now. I am officially an old fart. Now get off my lawn, you dang kids!