There are a number of reasons. Sometimes people send info to others in game. You could get some intel and see if they are plotting against you or your friends. When I thought of this idea I was think about solo games, you know games where people use in game communication more vs. outside sources.
I am a troll. Everything I say must be assumed to be said solely to provoke an exaggerated reaction to the current topic. I fully intend to bring absolutely no substance to any discussion, ongoing or otherwise. Conversing with me is pointless.