I'm more of the opinion that cameras SHOULD be allowed in. If it's just regular information being discussed then why the need for secrecy?
Unless trade secrets that would ruin a company or real national security topics (none of the oh my god terrorism bullshit either) are under investigation... what has the government or corporation got to hide?
Freedom of information people, it is your right.
"The algorithm to do that is extremely nasty. You might want to mug someone with it." -- M. Devine, Computer Science 340