She was singled out because her kind if jokibg around in a fast food restaurant was totally inappropriate compared o the joking around others did. You don't run around yelling like a grade schooler & yelling that someone is going to cannibalize you when working in a fast food restaurant or any other place when working with the public. Her joking was not even close to being like the others but was totally inappropriate for an adult to start with & definitely totally inappropriate for a place of work.

If you have read Ruby's previous threads, this is not the first time she has caused herself problems on her job for similar inappropriate behavior.