I have set the target costumer to ban ghosts and occults from appearing on the business but they appear anyway. It happens every time I open the business.
Edit By Crinrict: Adjusted title
Ideas
There's always ghosts in my shop though they have never caused any trouble that I've noticed. I have pottery everywhere; they've never broken any. One even fixed the broken sink in the bathroom once. Every now and then a flirty or playful one will cause everyone to get flirty or playful.
Wonder if it has to do with the alignment of your store. Mine is virtuous but I noticed in a let's play by James Turner where he was running a "schemer" store that the ghosts in his shop (and customers and employees) were particularly unruly.