There's just....not. It's a pretty well established concept by now. For almost 50 years or so.
> What counts as a "super public busy place" ? The airport? The bus terminal? The local library? All major roads that experience rush hour traffic?
Yes to all of these.
> Who is the person who says where the cutoff line is?
Not a person, but a sound methodology ideally. Kind of like what we've mostly been doing even if it isn't formalized.
> What if that authority wants to move the line to include everything?
Yes, the slippery slope is a problem, agreed. That's why we need to be vigilant in responding to government plans.
> Do they even need to provide notice to the public of their actions?
In a civilized democracy, they should.
> Government investigative branches only?
Yes, pretty much.
> What about the system administrators?
Not if it can be avoided.
> Does this footage require attestation to prove it's legitimacy in a world where AI can generate footage?
No.
> How long should this footage exist for?
3 - 6 months is typically standard.
> Do I have to trust not just current admins and their superiors but all the people who may be in those roles in perpetuity? IE do I have to trust people who haven't even been born yet?
You have to trust the system is accountable.
> Is it allowed to be centralised,
Ideally, no.
> Or should each site have separate data housing with access terms to match so that tracking a person is a significant task?
Bingo.
> There are a lot of concerns. You may argue that there isn't a lot of nuances because you have a set idea of how it should all go. But others may differ.
I'd argue your concerns have already been addressed by current systems that have worked fine for decades.