These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
This is similar to how Barlow isn't repelled by a crucifix that isn't held by a true believer, and can affect mortals even when he's dormant in his coffin.
For that matter, how the hell did Danny Glick (a just-turned vampire not nearly as powerful as Barlow) enter the McDougall household without an invitation? If he was invited, who the hell could have invited him in? The baby?
Jerk Ass Woobie: Sandy McDougall. She abuses her baby, but she is only seventeen, stuck in a loveless shotgun marriage and living in a rundown trailer. She also feels sick with guilt about her abuse of her child.
Tear Jerker: Danny Glick's funeral, with his father jumping into his grave onto his coffin, trying to get him to 'come out' and stop 'playing tricks' on him and his mother; ending with his despair that he "can't be dead. He's only twelve fucking years old".
The Woobie: Dud Rodgers, who despite having a hunched back and living in a landfill, was happy and good natured. Then Ruth dumps him and her dad has his best friend fire him. Then the Barlow makes him an offer.