The idea of property being defended by an individual is the myth. The reality was that, on the frontier, property was defended by the community. It wasn't just you, standing there with your musket, fending off the hordes of "injuns" and "rustlers" all by your lonesome. It was you and your posse.

I think the vigilantism implicitly endorsed by Citizen is entirely typical of the historical American attitude towards how one should defend their property. Moreover, it speaks to the breakdown of law and order in California that an app that organizes a modernized form of "frontier justus" can find enough traction to get off the ground.