[hamiltonkibbe]

If two people are having a conversation about something — let’s say the location of alice’s backpack — which is immediately obvious to anyone walking by the coat hook in the front of the office, should that conversation lose wiretapping protection?

[Forbo]

How would someone know the backpack is Alice's unless they were tapping the conversation? If you're not in the immediate vicinity of the backpack witnessing her drop it off, then you've gained information that is otherwise not publicly known. Sure, one could request camera footage showing the event, but I would hope that the person in possession of said footage would at least ask for a warrant first.