>>xmrcat+(OP)
> Their logic: You have to be friends with the user to receive this packet. Therefore, a "trust relationship" exists.
That logic is acceptable. You could also DM an offline friend a tracking pixel to reconstruct their activity, a lot of this endpoint security is entirely up to the user.
>>bigyab+61
True, but a tracking pixel is an active attack that leaves a visible trail. This leak is passive surveillance; I can silently graph the sleep cycles of 200 friends without ever interacting with them. Trust shouldn't imply consent for invisible, automated logging.