Perhaps they'd been conditioned by all the quarantines and blackouts, all the invisible boundaries CSIRA erected on a moment's notice. The rules changed from one second to the next, the rug could get pulled out just because the wind blew some exotic weed outside its acceptable home range. You couldn't fight something like that, you couldn't fight the wind. All you could do was adapt. People were evolving into herd animals. Or maybe just accepting that that's what they'd always been.