Can't find a time to call me when I've given you 5 dates and times? Red flag.
Can't get my resume into the hands of the folks who are interviewing me? Red Flag.
Tell me it will be a week and it takes two? Red Flag.
Call me 30 minutes after the scheduled time and not apologize. Red Flag.
Tell me I'm a perfect fit for the job, then the HR person calls me 5 minutes later to say that they will not be moving forward with the interview process. Red Flag.
Set up a time to Skype call me, cancel hours before the call, send an email 2 days later saying the job was filled before my interview. Black listed
Tell me on the phone interview that I will be called in for the face to face, send me an email 2 weeks later saying the job was filled. Black listed
Delay the hiring process because you want to hire another position first. Red Flag.
I could go on, and all of this has happened in the last year.