Who thinks ghosts are real? I will try real hard not to laugh at you if you do! Religion is stupid but ghost nonsense is just childish!
I never met anyone who had a good reason for believing in ghosts. It's usually been unexplained noises or reflections in a window, usually in an old noisy house. Either that or something they thought they saw when waking up in the morning. No reason to call tricks of the imagination ghosts. But some people like to believe in ghosts because they think it is evidence of an afterlife.