I'm thinking of telling a candidate that they were a shoo-in for a position and then ghosting them
That sounds really messed up, how will you tell the candidate the bad news?
I was going to let them know at a party.
It is wrong to trick people and then ghost them if they didn't get a job. You should get mental help for thinking anything like this was an acceptable behavior.
It actually arouses me to even think about humiliating someone like this.
Man, right now I think you may believe you're being cool but in reality most people would think you're weird for what you want to do. Ghosting anyone isn't nice, and turning other's humiliation into a kink can make you seem very weird.