Double edged sword. In every job I've had, there's always been at least one coworker who makes a point of probing items on a person's resume - even if it is irrelevant to the current job. If the person doesn't have more than a bare minimum knowledge of the topic they claim to have experience in, it is an automatic disqualification.
A lot of people really don't like resume embellishers.
I list anything I've completed more than a tiny amount of paying work in. Maybe leaving something off if I think it'll hurt my chances, comp-negotiation, or get me shunted to shitty projects. Otherwise, if I got paid to do it, and shipped, it goes on the list.
However, I can barely "hello world" without mistakes or consulting references in any language I've gone more than a week without writing. So if I only listed languages & such that I'm ready to take a quiz over at any given moment, the list would always be very short. I'd miss a lot of job opportunities. Guessing that'd get me DQ'd from your process, but taking the alternative approach of only listing the very-small set of things I'm ready to work in right this second at any given time would surely have had very bad consequences for my career.
We send a self assessment form (which is pretty much "here is list of techs we use, judge yourself on how good you are on them" before recruiting and ask candidates near-only of things they say they are good on the resume or that form.
You don't have to put in your resume though. Still dubious strategy, because you might be getting more irrelevant positions advertised to you because of that
A lot of people really don't like resume embellishers.