From the site you linked: "'You can't take my photo without permission'. Oh yes you can, usually." It's fairly clear cut that there's little you can do about it.
And I know for sure that banks don't forbid camera phones at least in general, because my father worked at one and all his people had blackberries. This was years ago, and camera phones have only become more ubiquitous.
“I know for sure that banks don't forbid camera phones at least in general”
I gave examples of settings where camera phones might be forbidden. At most regular branches of banks, they’re probably fine. I worked at the headquarters of a bank that also served as distribution center of most of my nation’s cash bills.
OK, so, it's rare. And you've as much as admitted that there's almost nothing you can do about it in public, so I've accomplished what I wanted to in this discussion.
And I know for sure that banks don't forbid camera phones at least in general, because my father worked at one and all his people had blackberries. This was years ago, and camera phones have only become more ubiquitous.