Well... I lead people to Insanity. To do so, I have to somehow... affect them. Stalking children is a way to affect the people around them. In the way of having to see, hear, and feel me, makes children scared. When they're scared they tell someone and that someone is their friends and family.
When they tell someone of my existence, it immidialty affects them. While affecting them, I get lured to them and I end up leading them into Insanity, for they had tried to deny my existence and that affects their Sanity even more.