All I can say is some of you must have some very boring jobs if you spend that much time worrying about what your co-workers are doing.
You miss the point, by a distance. The thing is we really, really, really DO NOT care about what they are doing. We don't want to hear them eat / smell their body odour / be acosted by their pets / see photos of their children / catch their flu / see their holiday pictures (especially the ones who are FAT). We just want to get on with our (very boring) jobs in a relatively pleasant and tranquil environment.
(There is also a THERAPY element to this thread)