Fog of war. Shit happens slowly, then all hell breaks loose, then the lines are devided. The ones that have been with you through all of this will not shut their door, but rather be in the streets with you. It would benefit us all to read the details of how the revolutionary war was fought at the outset, communication, there will not be any widespread use of electrical or electronic communication at first. But i am pretty sure we will know who the friendlies are rather quickly, as they wont be the ones running with the black bloc and blm shit all over themselves.