Looking around today, this is much more common than I thought. Many stores have strict no-photo policies and those policies are enforced.
A few I ran across while looking for information...
Apple Store
Macy
Starbucks
Barnes and Noble
Whole Foods
Sears
There were a lot more. Those are just some examples.
I'm not arguing the legalities of it.
Just pointing out that it's a common policy.
I never noticed signs but I didnt really look for them but at our Starbucks I take pics all the time of who Im with nd no one has ever come up to me and said anything:waitasec: They dont seem to care.