In the Nightmare on Elm Street movies, Freddy likes to creep people out with a few preliminary nightmares before he actually moves in for the kill. Invariably, he uses some little girls jumping rope and singing a nursery rhyme that details the precise nature of his supernatural crime spree:
One, two, Freddy's coming for you.
Three, four, better lock your door.
Five, six, get a crucifix.
Seven, eight, gonna stay up late.
Nine, ten, never sleep again.
Beyond being a terrible strategy (more on that later), Freddy reveals the biggest ace he has up his sleeve by deliberately telling his victims that A) he is powered by unholy magic and B) they have to fall asleep in order for him to kill them. He'd have a 100 percent success rate if he just kept that information to himself.
And maybe didn't put his face on every goddamned thing imaginable.
Meanwhile, Jason Voorhees is gullible enough to be convinced that any female wearing his dead mother's sweater is, in fact, his dead mother. And he just leaves the sweater out next to his mother's mummified head in a shrine in his backwoods meth shanty. He doesn't fold the sweater up in a drawer or put locks on his doors or anything. Sure, Jason probably doesn't have the level of awareness to recognize that the sweater is a crippling weakness, but he should at least be keeping his most sacred possession in a place where raccoons can't shuffle in and pee on it.