I agree that the disparity is frightening, but I think that the timespan for this problem is way too short to judge. These cases are popping up frequently in the news, most likely because of the sudden ubiquity of digital cameras. The law needs some time to catch up to this sudden shift. Also, we're not hearing of all the times when people are allowed to film the police, but I have watched many videos of just the Seattle police in the past year with no legal repercussion to the videographers.
I think it's pretty clear that nearly everyone (except the police (except when being glorified on "Cops")) agree that citizens have the right to observe law enforcement. The law is just ambiguous about this filming right now because it wasn't a consideration in the past. Some police officers are abusing this situation, but as more and more of these cases pop up, the law will have to be clarified.