Everyone in every culture has their own beliefs concerning the afterlife. Some flat out refuse to believe while other cultures accept it with open arms and in some cases honor spirits of the dead. None of these beliefs are wrong, but there are some common misunderstandings with people who believe in ghosts, here are just a few.
All ghosts are evil.
This is becoming less common as people are starting to realize that most spirits they see are not hurting them in any way. This theory may have come about because people feared the afterlife, it startled them and scared them to see and hear things they weren't expecting. They connected fear with evil because why would something good scare them. In reality, it is rare to come across an evil spirit. Usually ghosts do not mean to scare anyone.