I was referring to the privacy side of things, since that's the context of this story. Also would apply to trespassing - hence you can be removed from a private business if the owner/manager wants you gone.
OP here. syshum has it correct. If you take a photo with your lens on one side of the Apple Store's massive glass wall, it is legally the same from a privacy perspective as taking a photo on the other side (unless Apple explicitly forbids it).
From a privacy standpoint individuals have no more right to privacy in an Apple store then they do on the Street.
Apply can forbid photography on the premises, and remove anyone that fails to follow this rule but that is about property rights not privacy.
In correct, an Apple Store would be a Public Accommodation, there are all kinds of laws governing Public Accommodation that do not apply to a Private Residence.