Let's see. Masks obviously didn't work. But I think a large collection of events could cause enough internal stress in Sybil for the lazy bureaucracy to at least implement a military system. In fact, how does Sybil protect itself? If ten people suddenly decided to pick up assault rifles, then the entirety of Sybil is jeopardized. What are they gonna do, send a bunch of old grandma androids with guns against the insurgents?