In the olden days there were chain mails promising wealth and other good things if you would just send that letter to 10 other people. If you did not then the missive threatened dire consequences. Now we get the same thing on Facebook.
I am perfectly capable of choosing what I want to like or share. Please do not try to guilt me into doing something just because you did. I've also chosen not to play games on that platform so there's no need to invite me to join in what I am quite sure is an entertaining pastime. Yes, I do realize that you probably did not actually invite me to play that game since my invitation was most likely generated by the promoters/programmers of the game itself.
I'm happy to consider your friend suggestions. But I'm not likely to act on them. I've already got more connections than I can keep up with as it is. An invite from someone I know is a different situation.
One of my managers hosts a "town hall" meeting twice a month. He invites questions about the company. His main rule is: You can't trash other people or organizations. That's a philosophy that would be a great blessing to social media (and talk radio). It is really just a philosophy we all learned years ago from Thumper's mother. "If you can't say something nice, then don't say anything at all."