Technically, if the family makes a request of the county under GA Open Records law, they have to reveal their source. Someone should do that for giggles.
GA FReeper ping. I think we have at least a couple Cobb County folks.
If the vehicles are legally registered and driveable and no HOA rules prevail Cobb County should STFU.
My family was rooted in Cobb County for multiple generations. The officials in that county are crooks and liars, frankly. They are only interested in their tax digest, controlling the population and doing as little as possible personally (e.g., contracting out all the work official employees do). They’re nothing but crooks.