I had a friend (super sharp guy, very very good in programming) long time ago - whenever he is bored, he'll schedule an interview with some company, clear the i

I had a friend (super sharp guy, very very good in programming) long time ago - whenever he is bored, he'll schedule an interview with some company, clear the interview, and start negotiating the salary, just to see how much he could get. Once he gets an offer, he'll use that offer to drive up the offer from some other company that he interviewed with. Mind you, he had no intention of joining any of these companies, it was just a hobby/time-pass for him. I used think he is a jerk for doing this, wasting everyone's time. After reading how companies treat the candidates, I am not so sure ...