One of the secret strengths to police officers is their anonymity. 9 - 5 they're uniformed and endorsed. After-hours, despite their actions, they're at liberty to merge with the rest of society without identification.
This gives the individual relief from societal pressure to behave within community standards. It's gives rational to bizarre and dangerous behaviors, such as taking orders they don't actually think about or concern within the golden rule.
A temporary solution for this is http://www.nytimes.com/2003/07/12/national/12NET.html?hp
A large number of PPB officer photos and names have been collected at this indymedia over the past couple of years. The is senior staff photos and bios on the PPB site.
Perhaps some anon webmaster can create a site, which lists PPB, officers by name, precinct address, home address, cell phone, email and photo. I think folks will be surprised to see how many PPB officers live outside of the city of Portland.
Added caveat: I am not endorsing procuring this info in a sneaky or illegal way, or confrontation with off-duty officers in any way.