The cobweb has come to mean dirty or unclean. I can see our enemy satan as the one setting the schemes and trap for us. Cobwebs further illustrate confusion or not clear thinking. All these describe the process of Halloween. The ghost has come to symbolize evil.
Modern media portrays ghosts as good or bad.
This too is a deception as all ghosts represents evil spirits and therefore all are bad. The deception is to trick us into thinking evil is somehow good. The use of tombstones symbolizes death. This does not make sense. The celebration of death comes through.