HSBC has been trialling a scheme at two of its busiest London branches where it sends a message to passers-by through Bluetooth asking if they are prepared to accept a download. If they do, then it sends a full advertisement.
Assuming the idea catches on, I wonder if there will be any provision for customers to opt out of receiving unsolicited messages in this way? Alternatively, just change your phone’s Bluetooth settings to ensure it is not visible (a.k.a. “non-discoverable”).