I have already replied here, but let me go into further detail. I do believe in ghosts, and anything supernatural, but none of them scare me.
Heck, I've went to a house where PHOTOGRAPHS of ghosts were taken, I saw them, and I hissed at them to go away, and they did.
So, I'm not scared of ghosts, they're scared of me, even the pissed off ones cower, because I don't care if they can kill me, not if I can pull out a knife and make them experiance the same pain they did when they were dying. Most ghosts scare people, but it's ones who aren't afraid that can scare the crap out of a ghost.
Hell, my glare can scare the crap out of anyone...
and for further reference, I do carry a knife around everywhere it's legal.