I think this site is ignoring the value add for the interviewers as well. Interviewing others is a skill and takes practice and dedication. Many people just take some coding question and ask a candidate without thinking it through much and what they're actually analyzing. It would be good practice for interviewers as well.
You mean like: they could allow a third person to watch/listen the interview and at the end of it, rate the interviewer and give suggestions for improvement?
