It’s going to be hard to actually draw a line on what ought to be public. If I make a multiplayer video game and it has a chat feature, do I have to expose tha

It’s going to be hard to actually draw a line on what ought to be public. If I make a multiplayer video game and it has a chat feature, do I have to expose that? Opinions and feelings won’t cut it: what’s the prescriptive rule to know?