'Always on' or don't bother
Ok sT0rNG b4R3 duRiD, lets assume that a good majority of PCs are doing a tough job as best they can and would never knowingly use their powers unfairly or inappropriately when dealing with the public. So what?
The problem of law enforcement in society is not the law abiding majority but rather the small minority who choose to behave otherwise – either side of the thin blue line! In a just society those who enforce the law must uphold (and be seen to uphold) the same moral standards as those they police. This technology, if used by all public-facing officers of the law all the time, would ensure that in a stroke – assuming, of course, that access to the recorded material was made available to defendants and the IPCC!
And think of the flip side – how much easier would it be to prove instances of resisting arrest or dismiss claims made by defendants that correct arrest procedures were not followed if it was all there on film? Captured instances of our brave Bobbies and Bobbettes going above and beyond the call of duty and putting their lives on the line could also be used to promote the image of the police to the public or used in recruitment drives.
You might think that this it is unfair to put the police under that much scrutiny when they perform such a thankless task but a criminal conviction can have a massive impact on someone’s life. They may lose their job, their house, their family and their freedom. Power like that must be kept in check and if the police have complete faith in their methods then they have nothing to fear.
Of course there is a school of thought that says that thanks to Maggie T, rampant commercialism and corporate greed there has been a full on Daily Mail style collapse of civilisation and that the law-abiding majority has been replaced with a population of people all looking after their own self interests game-theory style and are in effect all criminals who haven’t been caught yet. In which case there is no reason why the average copper is above this and this technology is more pertinent than ever.