This is a heated hot button issue. Personally, I think it's a great idea. Cameras protect the public, sure, but they also protect the police. Now there can be recorded proof when a civilian says the police used excessive force, and will wipe out false claims of abuse entirely.
There are even...
I mean think about it, police officers protect us from the bad guys and enforce the law so that we would all be living (or trying to) live our ideal lives in whatever political system that we have. Although ideally, democracy isn't a perfect system, I think it comes close to the ideal state...