Manipulation

I think manipulation is the core of our social reactions to our peers. Sometimes someone may not intentionally manipulate someone, and actually do. Manipulating someone is like spreading things around that aren't true, or using a "friend" for something you need/want. I think some people do it intentionally to get back at someone for what they once did to them. But some people unintentionally do it, I have done it before, when your friends tell you a secret and you tell someone by accident.

Office Gossip Ain’t All That Bad - MediaJobsDaily