Yes LadyGracie, it certainly does happen in real life! It happened to me. I was once working with a wonderful team of people, we all got along really well. Shift work meant we were often teamed up with diffent individuals but we all got along so well. UNTIL another person joined us! When I say she was toxic I mean she was pure poison! Within a few short weeks she singled people out, manipulated people, invented incidents to cause problems, gossiped about certain people and caused so much trouble that two of the original, hardworking team left virtually overnight, they simply could not stand the strain. She destroyed so much within our team but she was so manipulative with Management that it took them months and months to accept that she was the root cause of all the unpleasantness.