You're trying to reason this through from a technology perspective, which is not how others are thinking about it. What matters more is the perception, not the software that makes it happen. We think of Gchat, email and hangouts as private communication. But playing an online game is more like being in a public space, so we have less expectation of privacy. Online games already have mechanisms for reporting toxic players, so you know going in: someone else may look at what I said.