Well that's a problem you always have with subjective decisions during hiring. At the end of the day you'll most likely get away with it unless you're being as

Well that's a problem you always have with subjective decisions during hiring. At the end of the day you'll most likely get away with it unless you're being as blatant as OP's company. But it only takes one disgruntled whistleblower to get yourself into trouble. And at least historically it's usually been the men who benefitted from this.