I didn't follow those links, but the thing is, it's generally only very young kids who get scared by the more gruesome Halloween displays. Those same kids, two or three years down the line, may be loving it. Displays that 8- or 10-yr-olds love could easily frighten a toddler. So I really think it's on the parents to keep their kids away from the "scary" houses on Halloween night, and if the child is afraid of the neighbor's house throughout the month of Oct., it's just a chance to explain the difference between RL & make-believe to the kid.
Like a night or so ago, my daughter & I were watching that new TV show, 666 Park Place, whatever it's called. She is 15, but she was getting really, seriously creeped out by one scene. So I said to her, "Look, it's a TV show. There are cameras all over the place. They broke for lunch. They laughed."
Once kids are old enough to understand that the Halloween displays aren't for real, their reaction becomes a matter of taste. Some people never do enjoy it, but that's like looking at someone else's art work and saying, "I would never pay for that painting."