"Dark communication" is a term that psychologists use to describe negative ways that people relate to one another, such as lying, gossip and betrayal. One interesting article on the topic is Jeremy Osborne's description of why he teaches a dark communication course at his college: http://www.theccsn.com/teaching-the-dark-side-of-c...
Consider these possible questions:
Is dark communication always negative for relationships?
How is dark communication destructive in marriages?
Why do most of us encounter and participate in dark communication so frequently?
What causes people to use dark communication?