Polybius is a great urban legend that got its start in Portland. There’s lots of fodder thrown around about it, but The Polybius Conspiracy appeared to be a real investigation on the subject. They even have a lot of interviews from local people. It turns out, it was COMPLETELY FALSE and their main character was an actor.

None of that was disclosed. It is one more reason you should be very weary of documentaries as information sources. Evidence shows you should NOT be putting faith in documentaries any more than an editorial opinion piece.

If you want a little better coverage, this is also a good video about the urban legend: