Ghosts typically haunt older places or graveyards or homes that an untimely death has occurred in. While spirits know they are dead, there are spirits on Earth. Ghosts are unaware of the fact they are dead and acutally can harm you. Ghosts are easily captured on camera and on rare occasions can be seen with the naked eye. Ghosts also talk and on rare occasions you can hear them with your naked ears, but many times you need a tape recorder (or digital recorder) to hear them talking. Ghosts' personalities range. Some of them are vengeful and those are the ones to watch out for. Hauntings can get severe enough to posess an entire home. Those're my facts.
The Amityville Haunting is one of the most famous haunting hoaxes known to man. This involved the grisly murder of the DeFeo family. Pictures have been proven to show there are ghosts in the house.