If it was truly a private chat, there is no sealion. That's why my perspective on this is that it is precisely about the expectation of privacy (even when in a

If it was truly a private chat, there is no sealion. That's why my perspective on this is that it is precisely about the expectation of privacy (even when in a factually non-private context), or as you note a clear division between participants and observers. And that's why I think there's a cohort/age-based aspect to this: early users of the internet never had any concept of privacy in general, other than for email.