Do traffic laws apply to pedestrians?

The title is a bit misleading - or maybe it's not.  I'm not really referring to actual traffic laws regarding pedestrians, but instead am asking whether traffic... 'etiquette' is probably a better word... should be used by pedestrians.  For example, walking on the right side of a hallway.  Stopping at a busy intersection to let people pass.  Passing people on the left side, instead of sneaking up on them on the right.  Stuff like that.

Anybody got an opinion?  I'd love to hear it.