Those do exist of course, people sin up and get their names on the ballot with no interest in winning or campaigning seriously.
Funny, you should mention ghost candidates do exist. One time in Dallas, I worked in an office right next door to a ghost chandidate who ran for State Rep. as a Republican. She rarely left her office and still won the race. She was Chinese too. Even on Election night, she was still quietly working at her office as if nothing special happened. I forgot her name though.