Here's an
article from our local paper. (The link may eventually expire, but there's a similar article linked to Andy's blog and here's one to a
Tech Web article.) The manufacturer that you remember banning "camphones" on its premises may be Samsung. Apparently, South Korea will pass a law that requires camphones to "emit a warning sound" when pictures are being taken.
Banks who perceive this as a security issue could prohibit cameras on their premises (employees too). However, the prohibition may have unintended consequences as indiciated by Starbuck's experience after allegedly implementing such a policy for "copyright" reasons. The "ban" generated a fad where truly devoted netizens now feature photos of themselves taken at Starbucks on their home pages. (It's an Internet thing, I wouldn't understand.)
Drafting the dress code signage required in the modern bank lobby, i.e. no hats, sunglasses, guns or cameras is one deserving of Zaibatsu's literary skills.
Now, back to work...