I saw an article in the news yesterday that laws are going to be passed subjecting the police to being recorded by anyone while performing their duty or enforcing the law and encourages citizens to sue if they interfere. Some law enforcement agents become angry and confiscate recording devices from people recording them while making an arrest, etc.
It does seem that the work that the police and other government agents do is public and not private or confidential so there should be nothing to hide from the cameras. On the other hand, how can one distinguish being shot by a camera or by a weapon until one is hit?