The world has become a much bigger place. You used to know who to avoid, the default was someone was acceptable. Now the ones to avoid move around and it's all too likely that a newcomer is such a person.
> Now the ones to avoid move around and it's all too likely that a newcomer is such a person.
This seems a wild generalization to make, though I guess "be suspicious of newcomers" is a little biologically hardwired. What's your epistemology for believing "newcomers" are "the ones to avoid"?