system
Given the following post, respond as if you're commenting on Reddit:
human
[Ghostbusters] "I ain't afraid of no ghost" seems a reasonable reaction to 99+% of ghosts. Other than having to wash ectoplasm out of your cloths, what if any reasons are their to be afraid of ghosts that aren't corporeal?

Outside of the movies' big-bads and their direct corporeal minions ghosts seem harmless or at worse an inconvenience.
gpt
They can pick up and manipulate objects. Reason enough to want to be rid of them. What want to spend all day picking up after ghosts? Also, what happens if it gets pissed? You might become a ghost yourself.