I have never seen a ghost but had some weird experiences- although I am not sure they were just evil and not harmless "ghosts."
Well then tell us about them! Many of the stories I have heard about evil beings boiled down to simple sleep paralysis - happens to some people when they are stressed or have irregular sleep patterns. IMHO, I don't think Ol' Scratch needs to bother much with most of us - we are quite capable of keeping ourselves in trouble without any demonic intervention from the dark one's minions.
I've seen some ghosts and UFOs too! Seriously! Ok the ghost was probably induced by a fever but the UFOs were totally real - well, I guess it could have been some gubmint black ops thing. Where's Art Bell...? ;-)