I walk my bike at intersections. It's much safer to do so.
As a cyclist, it's best to ride as close as possible to the edge of the road, to avoid disturbing the motorists. This only applies where there are no bike paths, and there are none in my city. If I want to ride through an intersection, I have to switch to the correct lane. And the lane used for going ahead(instead of turning) is obviously not adjacent to the sidewalk. That's why I would rather walk my bicycle at intersections. There are exceptions, though-for example, when the sidewalk cannot be used etc. etc. etc.. Depends on the circumstances.