I think people who choose not to believe in the 'unknown' as you might say are usually narrow-minded. Everybody alive knows
noting about death and what happens after, considering, well, we're all still alive. We've yet to have that experience. But there are far, far more dead people on the earth than living people. Death is a lengthier experience - as far as we know, it never ends. Yet life is so short and we only get one chance. It makes life appear like almost as a humble waiting game until we finally reach death. Eighty years alive is nothing in a world that's been existing for well over 4000 billion years.
I'm not apprehensive of death, it doesn't scare. My view of death is that when you're gone, you're gone, and you're too dead to even realise you are dead. If I die but I'm not able to realise I'm dead, how does that become an issue for me?
Not that I want to die yet... not until I'm old... but irregardless my point still stands.
Of course there are other views, such as heaven and hell, which I personally don't think exist but I wont say they DON'T, it's just my opinion. Remember people.. if there was a heaven, and you went there after death, you'd never be able to leave. Not after a hundred years. Death goes on forever and ever, an infinite timeline, there's never an ending, and that's a long time to spend in heaven don't you think? Except, if you go to heaven for a while, and get reincarnated - have a new chance at life, then die all over again. Back to heaven to wait to be reincarnated. That makes more sense to me. Why waste souls when they could be recycled for new lives?
That's my say on death... concerning why we're scared of ghosts etc... I agree with Jen - we're inclined to fear what we don't know, although some of us are more curious and attracted to the unknown than others. I've seen strange, curious things before. I'm sure we've had things mysteriously disappear or move to a new location in the house without explanation. My theory is there are ghosts EVERYWHERE... we just can't see them, because they're souls, and living eyes can't see souls. When you walk around town just living your life, I feel there's souls just gliding about everywhere. May sound stupid but you're not eligible to knock this theory unless you're dead and can prove me wrong.
But in the end, death, and why we fear death/unknown things, is an unanswerable question because we simply can't answer it until we've reached that point, or in regards to fearing the unknown - some people fear it, some people are attracted to it. Some stray away from it, some go looking for it. I don't fear it but I don't go looking for it. I guess the people who are scared of it simply don't like it because things are happening that are out-of-the-ordinary, and many people prefer conventional lives.