Earlier quoted context omitted.
It is rude. People put lots of effort into resumes. But it's ruder to reject a candidate based on age, gender, martial status, education or lack thereof or doing non sw jobs in the past. I always talk on the phone before and that's where we both make sure the interview is of relevance.
> age, gender, martial status What resume has this information? This is all stuff you can infer from the interview itself.
But, I have no idea how you gather gender or marital status from a resume.