The potential problem for the police that I’ve seen is that when there’s an arrest from some resisting person and a sympathetic crowd gathers around to record and voice some words of protest, it’s a chaotic situation. You have people going crazy hooting and hollering and it’s a bad situation to be in even if the cops are 100% doing the right thing by the book. I don’t know what’s the right distance, but I get that cops want to maintain some distance from crowds so they’re not swarmed.
In the end, I don’t know what can be done other than mandating personal recording equipment that can’t physically be switched off.