This is the same case with travel reservations. It is surprisingly not resistant to internal attacks and would be one of the top 3 most severe disturbances in t

This is the same case with travel reservations. It is surprisingly not resistant to internal attacks and would be one of the top 3 most severe disturbances in the world (I have a hard time imagining the other two - your banking example is one of them, if they are indeed that centralized)