"I had a friend who interviewed at Google, who is an excellent software engineer I've worked with for years, but who got rejected with extreme prejudice because he was interviewed for the wrong position. He was going for software engineer, they interviewed him for networking/systems reliability, and asked him all of these sysadmin/network-admin style questions. Even after he told them they had set him up with the wrong set of interviewers, they still kept the schedule."

Unfortunately, I've read similar anecdotes on HN. Pretty disrespectful of the candidates time.