That's a really good point. Its not just the useless people that reduce a team's effectiveness. A few jobs back, I worked with a person that was incredibly bri

That's a really good point. Its not just the useless people that reduce a team's effectiveness. A few jobs back, I worked with a person that was incredibly brilliant, and a very prolific developer. Unfortunately he made everyone around him miserable in countless ways (definitely a prima donna). He would rewrite large sections of code and change core user functionality without asking product managers or other developers. When confronted, he refused to revert his changes because he had done it right and "everyone would see once it was released". His abilities and contributions would likely put him at the top of a stack rank, but overall he may have hurt the company more than he contributed.