Lets say you were a person that was good at Lucid dreaming and got to the point where you could dream about certain subjects.
Now. You are a person who has, lets say, a family, a good job, and a lot of responsibility.
In your younger years you liked to party. So in your Lucid dreaming you take up whatever bad habit you desire. ( Living vicariously through yourself) through Lucid Dreaming.
Good or Bad?