People have been taking pictures of impressive buildings for as long as there have been cameras. Before that, they painted pictures of impressive buildings. And public transit. And street scenes. It's thanks to these images that we retain any sense of the history of our cities and ancestors. They're also some of the most striking art ever produced. "Security" is a bogus reason to discontinue this ages-old practice -- terrorists can readily take photos with hidden cameras, or rely on the existing stock of photos, or wait until no one is around, or memorize features of the buildings they plan on attacking. All that this sort of ad-hoc ban accomplishes is to punish non-hostile, private individuals doing something that's as old as buildings themselves: documenting the way we live.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.