Let's see. I was a peace office for 30+ years, my ex (the bad one), in addition to other jobs, was a phone company operator, a very stressful job. My wife (the good one) was a law enforcement dispatcher for 30+ years, a VERY stressful job, and in addition was once married to a wife beater, was kidnapped and raped (along with her 15 year old daughter) by an armed serial rapist, my daughter and her husband are both postal workers, and NONE of us has ever gone nutso and started blasting friends or coworkers. So no, I don't think so. I think it is upbringing more than anything...
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OBG