If someone doesn't like you it is easy for them to set you up for failure and discontinue your contract without warning. While in training class, I left my computer unlocked by accident. The other new hire took the opportunity to write slanderous things about me and congratulatory things about themselves from my chat account. This was joked about and encourage by a trainer in training in the room when I returned. This was done under the guise of teaching the trainee about desktop security. But it is never ok to impersonate someone or slander someone on an employee chat board. You are actually also training some one to be an insider threat by encouraging them to use someone else account without permission. If a person leaves their keys in their car it does not give someone the right to steal it.