Well, many believe in them and may have amazing stories to tell: many say it is superstitious nonsense, claiming that there is no such thing as a 'spirit'. ghosts are real PS: woo hoooo-oo
It's only Thursday! Anyways its about time people moved away from fairytales such as this and religion, 21st century now and all that.
Evidence is a human and earthly concept. Ghosts are meant to cross over from 'the other side'. If God is meant to be as great as the idea of God suggests, God could easily work on a higher level. Psychics though, I'm inclined to agree with you on them.
Very subjective topic..I have seen things which I can't explain with the laws of normal science..Whether these were the spirits of dead people or not is another matter of which I don't have an answer.