My worst interview was almost a year ago. I was very excited to interview with this company since it looked liked they were very focused and new what they wanted. I had two phone interviews before they brought me in. My final interview was with the ceo who had no productive knowledge of technology whatsoever. When I found out they were redeveloping systems for deployment on deface rent servers, which would also require their sales people to learn yet another password, I asked why they didn't consolidate their systems and re-use what they have. The Eco simply responded with, servers go down. I wanted to reply with, damn somebody should tell Netflix or google this rid but of information. I was basically done at that point.

I interviewed at my current workplace a few short hours later.