Is the "portland-esk" (esque is the world you're looking for) attitude you refer to here being the type of idiot who will just let themselves get hit 30 times while they silently sit and stew, never stopping to say anything?
Sure, people should make an effort to be more aware of their surroundings, but at some point you have to assume some responsibility in being the passive dolt who just sits and takes it.
Not paying attention to one's surroundings while simultaneously pissing off the person next to you so much that they write a passive aggressive rant on the internet about being bumped into on the bus? If that ain't Portlandesque then I don't know what is!
Sure, people should make an effort to be more aware of their surroundings, but at some point you have to assume some responsibility in being the passive dolt who just sits and takes it.