system
Given the following post, respond as if you're commenting on Reddit:
human
[Supernatural] How are monsters not getting constantly hassled by ghosts?

I mean, they kill people constantly, often literally eating/reanimating their corpses. At the very least they get covered in blood regularly and have a ton of corpses to dispose of. 

Every single dead person gets the option to stick around and be a ghost, surely some of them decide to stick around to protect their loved ones/community or just plain get revenge on the monster that killed them?
gpt
Well, most monsters are ancient and have some occult knowledge or mess around with magic, so maybe they have means to scare them off or outright get rid of the hauntings. Aside from that, i'm not sure if most people pick the "i'll stay". Not hard to do initially but getting stuck or turning into a psycho (not to mention the traumatic process of becoming a ghost barely able to interact with others) are things. 

The average joe prolly lets go of his ties and goes on, and doesn't know about the "powers" that come from becoming a ghost. There's limitations too, most ghosts seen in the series could only roam certain places depending on context, that wouldn't help the idea of hunting their monster (that are usually free to go wherever they want), and the person may lose sight of their original purpose.