One piece of trivia orbits modern board gaming like a dark, sexy star. Someone who doesn't really play them will always have heard from their friend, who heard it from another friend, that games like Game of Thrones or Battlestar Galactica are mean. They ruin friendships.
It's true that in recent years, board games have been discovering the joy of traitors and treachery. As anyone who's played a particularly tense round of poker will know, there's a strange, emotional core to table games. When you're next to somebody and sharing this experience, you really do connect with them. As I wrote for Kotaku a couple of months back, board games are emotional power adaptors.