

Surely someone who wants to centralize ALPR information will simply use a service that already supports that feature. It seems unlikely someone trying to conduct mass surveillance would chose to modify a product specifically designed to make that difficult when there are already dozens of services that support that natively.
I guess I should clarify: Predator itself is already entirely open source, offline, and self-contained. The issue here is regarding an external service that allows you to import and manage data collected by Predator. By making this external service proprietary, I would be able to host the service and regulate how it is used. By making it open-source and self-hostable, I’m giving up control over how people use it.
I’m not sure this is how that would work. The AGPL specifically guarantees users of the software the right to use it for whatever purpose they want. Assuming the government doesn’t host a public instance of the software for third-party users, they are under no obligation to share the source code. As such, they could continue doing whatever they want with it with zero oversight.
The argument for a proprietary license would be that V0LT maintains control over the only public instance, meaning it could enforce the rules each agency agreed to. For example, a university wanting to do parking enforcement could be given a 7-day license plate retention limit, and have their ALPR geofenced to the perimeter of the campus. This oversight would not be possible with a free license, hence the dilemma.