Frankly, I'm perplexed. I've seen a lot of "Not really horror, but..." qualifiers on this board. They have been in reference to such things as:
From Dusk Til Dawn
It would never have occurred to me to question any of these as belonging in the horror genre. Am I in the minority? I would be very interested in hearing the opinions of those who don't feel like things like this should be categorized as horror.