It is a general understanding that you hire someone who wants the job and who shows some acceptable level of seriousness to that effort. If someone goes to an i

It is a general understanding that you hire someone who wants the job and who shows some acceptable level of seriousness to that effort. If someone goes to an interview and messes up that dynamic, many interviewers make a really quick decision in their head and waste the remaining interview time trying to be polite and not mess up the company image. Skills wont matter at that point of time. Most of the "WTF" events in interviews happen because the interviewer made up their mind already and there is still a lot of time left and is under-prepared to handle the social situation that happens next.