The answer: Ghosts who are here to take revenge on people who
have done them wrong in the past when they were alive, and/or
to settle unresolved negative karma with the people they are
seeking, as these people will naturally feel the most fear when
encountering these ghosts. Generally, ghosts will not bother with
living people, unless there is a real reason to. You can be
standing/sitting/lying next to one without even knowing it, as most
people cannot see them.
Living Light Universe