I believe it all just depends on the kid and not just the movies they've watched. My son didn't like haunted houses even before he started watching any gory TV or video games, and my nephews are pre-teen now and they've never been exposed to any gory television or video games and they're deathly afraid of haunted houses and anything that goes bump in the night.
But I think it all boils down to the fact that "haunted" or "fun" houses are a trip through the unknown, and the less experience you have with life (being only ten or eleven years old or so) that haunted house may be their first experience dealing with the unknown and most at that age haven't learned yet how to handle it. I guess experiences like this is how they learn though! Some kids will be happy-go-lucky and won't even think about possible perils, others will be super-pragmatic and that can go either way, yet those with no sense of confidence will be unreasonably afraid of everything.
But I think it all boils down to the fact that "haunted" or "fun" houses are a trip through the unknown, and the less experience you have with life (being only ten or eleven years old or so) that haunted house may be their first experience dealing with the unknown and most at that age haven't learned yet how to handle it. I guess experiences like this is how they learn though! Some kids will be happy-go-lucky and won't even think about possible perils, others will be super-pragmatic and that can go either way, yet those with no sense of confidence will be unreasonably afraid of everything.