Question

why did ghost want people to stop using ouija board?

Answer 1

The ghost wanted to stop the people from using Ouija board because they are using these boards for asking meaningless questions and so the ghosts have to sit there and answer them rather tgan doing their own work.

Answer 2

The ghosts wanted people to stop using ouija boards because they would now have to sit and answer questions and found no time for their own amusement.