You don't. It is a healthy fear, realistic. You should be very afraid. Or de-ghost your home. Burn some white sage is what my mom always done. I don't know of many ways to get rid of them. By the way, I think it is poltergeists I think you're afraid of; ghosts do nothing to you, but poltergeists throw things. Search the Internet for some ways to get rid of poltergeists.