Earlier quoted context omitted.
No, long ago the world was a bunch of small groups of people that knew each other intimately. At the village and tribe level there was little or no anonymity. The offset was that there was also intimacy . The problem now is that we again have no anonymity, but there is none of the intimacy needed to offset the negative aspects of this (and we probably can't, I don't think intimacy scales the same way, but who knows).
The people who left their tribes (or were forced off) were effectively anonymous to any new group of people they might come across. So if you were kicked from your group for a misdeed, sure you could continue your bad deeds in the new group or you could turn over a new leaf without the weight of your past mistakes holding you back.
It's an awful dangerous place when you're alone out in the Wild West.