I walked out of an interview, furious, probably two decades ago at "major cellphone company". HR advertised for an RF engineer position, which I had the education and experience for. I can totally sympathize with being rude because I'm normally very calm and I was Barely, just barely able to keep under control. So I burned 10% of my annual vacation days to come here, and drove half way across the state for hours to be bait and switched into a 1st level high school dropout call center support job at about a fifth my current pay? I'm thinking are you F-ing kidding me? I just barely kept it civil and made sure they understood perfectly why I was walking out of the interview. I saw in the bathroom mirror on the way out that I was blazing red in the face so I must have been quite the sight. The HR woman who screwed up the job req and ad and phone interview was more embarrassed than I was, and I actually got along excellently with the technician dept team lead, because we were basically at the same level at different companies (I wasn't mad at the individuals, solely at the situation).

What HR meant by RF engineer was by RF they wanted a call center guy to handle dropped call issues and by engineer they wanted to never pay overtime. Um, sorry HR lady, thats not really what I went to school for, nor is it anything like what I was doing at that time for about five times the annual salary, admittedly with a very similar job title.