Guy Kawasaki said, paraphrasing the point in the video linked above or in [1, 2, 3, 4, 5] (it was also in the biography, "Steve Jobs", by Walter Isaacson): “Steve Jobs has a saying that A players hire A players; B players hire C players; and C players hire D players. It doesn't take long to get to Z players. This trickle-down effect causes bozo explosions in companies.”
For one thing, for software professionals (like for landlords), this is outright illegal and you'd get arrested for it, and moreover it's no joking matter because there are many real victims of such sexual exploitation