One might be less inclined to leave a good review about your work skills if they are close to non-existent, or if you acted horribly towards them. Some will take it even further, and make sure to ruin a hypothetical future you might have at a new company. The point is, if you're managing people, be a good person. Otherwise, you might end up like this guy, who lost an incredible job opportunity because of an ex-employee's grudge. After a long, tyrannical reign, this disrespectful human being of…