@gollum,
gollum wrote:
I was given a shopping bag by my local savings bank upon opening an account. The inner lining is silver in color and might be aluminum.
As I exited a store today, a security officer told me that such a bag is used by criminals to do shoplifting. He said that it should not be brought into the store.
Is he correct?
If the bag lining is metal and therefore a Faraday cage then it could interfere with some anti theft systems.
A fast means to check it would be to place either a cell phone or a small radio in the bag and see if they still function or not.
Now stores can made any rules they care to made but off hand I would not worry about the matter as it hardly illegal to have such bags with you and the worst that could happen is that you would need to spend your money at another business next door.