Ad-Finem-Fidelis said a 'terrible handshake and bad posture' is a sure sign a candidate isn't really interested in the job, and fellow user Mightychook described one interviewee who was 'dressed like she just came out of a crack den'.
The same hapless job-seeker took her phone out during the interview and complained that it was taking too long, according to the recruiter, who said she 'raised pretty much every red flag'.
Aside from being punctual and dressing the part, job-seekers would also be well advised to leave their phones and their personal lives outside of the interview room.
Pookiemoe said the ultimate red flag was 'answering your cell phone... Constantly... During an interview'.
'Needless to say we thanked him for his time and moved on,' they added.
For user barnfodder, over-sharing about personal issues is a major red flag when it comes to potential hires.
They wrote: 'Ain't even all the way through the door and you can't separate this place from your personal life?
'No chance.'
Apparently some job-seekers fall foul of employers' bugbears even before the interview stage.
A Reddit user who had to hire his own replacement before leaving his position said that of the hundreds of candidates who applied, only 20 remembered to attach their CV and cover letter as a PDF as instructed.
'It really made me wonder why the hell it took me so long to find a job after college,' they said.