Bad idea for two reasons.

1. When a cop has to make a split second decision he doesn't need to worry that he can't get his gun out of his holster quickly and easily.

2. This doesn't record the events leading up to the gun being drawn. Basically, you only get half the story.

Keen's perspective is entirely valid. There are definitely good, talented people out there, but much of Internet "journalism" is generated by partisan hacks with less-than-stellar credentials. And that's true of people on the political left as well as the political right.