No, disagreeing does not completely disable anything, as you can call Subaru at any time and tell them that you want to subscribe, and they can enable Starlink

No, disagreeing does not completely disable anything, as you can call Subaru at any time and tell them that you want to subscribe, and they can enable Starlink remotely. I do not know exactly what is transmitted or stored when you do not have an active subscription, but you are one warrant away from having the police ordering Subaru to track your car. But they would probably try this with your cell provider before they try your car manufacturer.