Notices sometimes get stacked over an inch deep, and sometimes little care is taken about what notices are piled on top of what. There is a basic "street rules" type of ethics about covering over other people's posters: when it is acceptable and when it is not acceptable to cover over other events. However, I am a native born Portlander and I have never been able to figure out what those rules are.
Posting these notices, by the way, is against city and county code. People do this anyway, however.
However, due to the laws, some parts of Portland have clean power poles now, but certain areas of southeast Portland are still holdouts of the tradition.

