Are ghost really from dead people??

spirits are from people who have died from natural causes, ghosts are from people that died because they were murdered or in a horrible accident and don't realize that they are dead, they are angry and can be harmful, as for demons and whatever else aren't called ghosts or spirits they are call poltergeist. no it's not OK to go around hunting ghost/spirits/poltergeists if you don't know what you are doing, but there are professionals who have done this kind of things for years.

Well I think they are from dead people who have not accepted or is confused about themselves. They refused to go to the other side as they are refusing their status as already a spirit. They are either good or evil but most of them are misunderstood as they create fear from us living here as we could not understand them too that is why we misconstrue it as evil most of the time.

ghosts can be the spirits of those that have passed on but not moved on
there are many types of spiritual entities though
there are regular ghosts, residualual energy ghosts, poltergeists and even evil or demonic entities
ghost hunting is not a game but its also not dangerous if you know what you are doing
but it is fun if you do know what you are doing

minus me please, thanks