Otherwise people would be too bothered by the camera. And the framing is no easy thing to fix. The metro is full of people, commercials etc. I always concentrated on people's expressions and let the other things just be. I somehow like the faces cut in half etc. The empty areas, well I'll have to think about that.
Eric, you need to answer these questions for yourself.
Which people would be bothered, them or you?
Does your audience care if taking the shot bothers either the subject or you?
As to the framing, if you get the camera up that problem is much easier to solve.
Mark Barendt, Beaverton, OR
"We do not see things the way they are. We see things the way we are." Ana´s Nin