Police have no expectation of privacy when performing their official duties, at least in the US, so that should be a non-issue. If they don't want to bring consequences unto themselves for what they're doing, then perhaps they should stop doing such things or think really hard about their chosen career path.
> After all, it's not really the individual officer who is at fault: it's the system that trained the officer, and the department policies that require officers to apply unreasonable force.
At some point you can't just blame "the system" and there needs to be individual accountability. Mayhaps if they like the lack of it and with less bodily risk, they could pursue politics instead.