Who Are The Shadow People?

You're alone, engrossed in some activity until you arbitrarily turn your head. There is a dark figure standing in the shadows only yards away, watching you. You really don't notice until it moves; faster than you can turn your head. Was someone there? You dismiss this as some peculiar anomaly of your own questionable eyesight. Regardless, you can't shake the feeling someone was standing there, Lord knows how long, watching you.

For those of you who don't know, Shadow people often appear as t...