As a child of 8 in 1968, any event involving a werewolf attack had the effect of inducing nightmares, but particularly in the case of an out-and-out attack. I remember my older brother waking me from a sleep walk in which I wound up hiding behind my bedroom door, saying, "The werewolf's gonna get me! Help!" After I got over it, it became a joke between us.
As an adult, I find Barnabas' set up of Willie as the maniac responsible for Maggie's kidnapping particularly deplorable. However, the fact that Barn never really makes it up to Willie later, and Willie befriends him anyway, is even more irksome. I guess it's the writers lack of logic and depth, in this latter case, that disturbs me the most.