Ah to live in the 70s and 80s where nothing was verifiable. I probably would still have been a model employee but the possibilities were endless.
The McCanns vanished, as did Sally and Steve. It wasn’t that hard; they were living in the golden age of fugitives.
It makes it sound as though the anomaly were not the past two decades, but all of recorded history which preceded them.And if you wind the clock even further back, you could hardly go further than a few villages away on foot or horseback before people would get very suspicious about an outsider venturing to their domain.