"Psychological terror or mobbing in working life involves hostile and unethical communication which is directed in a systematic manner by one or more individuals, mainly toward one individual, who, due to mobbing, is pushed into a helpless and defenseless position and held there by means of continuing mobbing activities. These actions occur on a very frequent basis (statistical definition: at least once a week) and over a long period of time (statistical definition: at least six months´ duration). Because of the high frequency and long duration of hostile behavior, this maltreatment results in considerable mental, psychosomatic and social misery."
The Mobbing Encyclopaedia
Frankly, I believe we have seen instances of it here where several people would come on a single thread and bully colorcountry.