No they are not
Yes, for the most part
You can take pictures in public places like the lobby, banquet rooms, viewing areas... There are floors with private offices and it will annoy the hosts if they find you ducking around security signs. Several times a week, I see people taking staircases that are off limits because they just wanted to go exploring in public affairs or where the church patriarch has his office. Don't ignore rules and you'll be fine.
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