Gregory's Server@Gargron @orangelamp well, the problem here seems to be more of "data they think being private actually being public" so the solution there is to clarify what is public and what is not (e.g. discord group chats are actually public even though they don't feel like it)
@mewmew @orangelamp In Discord's case I think you're wrong. Discord profiles do not show what servers a user is in, so the developers clearly intended that information to not be enumerable. Discord servers are also not public spaces, it takes an invite to get in (excepting the special partnered ones). So what's happened is not what the developers OR the users intended to happen, and it IS a clear breach of privacy, since that data is then duplicated on a service users didn't opt into