If I search for a job applicant's name and see them at 12 years of age trying to use github then that's totally a plus. What sort of idiot would think it a minus?
Ok, I guess it might ruin their chances to go to rock college where they learn to throw rocks and nerds while whooping and hollering. Perhaps a Fourth Reich will rise up that is Luddite and those capable of engineering software will be rounded up and placed into... oh wait that did kinda happen in Cambodia under Pol Pot.