My reluctance has been about the elimination of discretion they represent. No more "catch and release" by cops anymore, which saved my ass more than once.
With cameras, if the catch you you're going to jail. Because prosecutors will demand it and technically cops are supposed to do it now.
Anyone wondering what I'm talking about start here:
The Psychology of Persuasion
Are you seriously here to tell us YOU are different and when you hear about someone who has a fight with the police, you automatically think the police are the aggressors? That says quite a lot about you.