DEFINITELY haunting some exes' houses.
What would you do if you were a ghost and could still exist on this plane of existence? If you didn't answer "mess with people," then we question your commitment to the world of ghost humor. The writers at CollegeHumor entertained this thought, and they do a good job of hitting all the main "I'm-a-ghost-and-now-people-are-going-to-get-it" fantasies.
And none of those fantasies are making pottery with a loved one. Sorry.