I just realized how utterly defenseless and vulnerable Ghosts are
They haven’t been shown to be able to pick/lift things up, and can’t manipulate anything that isn’t a computer. They have no weapons, no camouflage, no defensive countermeasures in their shells.
What I’m getting at is
You could probably trap a Ghost under a cardboard box with some books stacked on top of it
Bad and naughty ghosts go to ghost jail to atone for their crimes