As others have pointed out this thread has been a number of times, so I don't know how many responses you are going to get. That being said, I've always refrained from responding so I'll offer my opinion in this case.
My department has had dash cameras since the 80's, back when they were just VCR's in the trunk. Now days we have fancy digital cameras that are completely automated, we don't do anything to them. All the video is automatically uploaded to the server, we never see it. Even if we are inside someones home the camera is on so that our mic's are recording. I've never policed without a camera. In the rare circumstances where I'm doing something and the camera isn't on us, you don't consciously realize it. Nothing changes, because you've been trained that it's always there. That being said, I don't want to wear a body camera. It's just one more !@#$% thing I have to put on, one more thing to break and one more thing I have to waste time dealing with. I've never had a complaint that wasn't completely and totally proven false by simply watching my dash camera.
Yes and no. My department has absolutely no "quotas" or "expectations." There are officers in my department that haven't written a traffic citations in years. That being said, there are other things you can't avoid. You can't just dump someones weed out and send them on their way, or crush their pipe. If you make a pedestrian stop at night on juveniles out after curfew and the camera comes on, I have to cite for curfew violation and make contact with parents or take them to juvenile receiving. If I pull someone over for no insurance I can't just release on citation, I have to impound their car regardless of how "sad" their situation is. This is one I really hate, I hate being a car thief. This is due to a recent law change that took the decision out of our hands and requires we impound. If the camera catches it, I have to do it.
Absolutely protected, law enforcement aren't machines. More importantly the camera doesn't catch the entire situation, the emotion.
Look at departments who now release video almost immediately following an officer involved shooting. It doesn't matter how justified it is, people see what they want. People see things happen on TV and fail to realize that the real world is nothing like TV.