The only woman on these shelves is in the picture frame
It's been suggested that publishing these ridiculous remarks is an act of subversive exposure, as in, let 'em hang by their own nooses. I suppose that's a valid argument; I once quoted Feynman on women without comment. (I do think quoting published material is different from being the original publisher.) But after consideration, I don't think this argument really works. The internet is already a wide-open platform for people to express their ignorant, hateful opinions. Do these jerks need more space and encouragement?
I once abandoned a pet project of keeping a running count of the number of male versus female authors named on a blog called Recommended Reading. These questionnaires are basically like course syllabi -- authors name the writers they most admire, emulate, and recommend. Many of the people interviewed do not mention a single woman author, or mention one woman for every ten men. See, for example, Jimmy Chen. (He does, to his credit, recommend a list of Japanese authors, but note that he's Asian; the only authors on the site I ever saw recommend more women than men were women.) Or Timothy Gager. Or Ryan Ridge (one woman, 22 men). Is this blog letting people hang by their own nooses? No, it's doing what 99% of the Internet does every day: reinforcing our pervasive subconscious gender bias. In the case of Recommended Reading, the reinforcement is subtle; it goes without mention. The only thing different in David Gilmour's case is that Gilmour is conscious of his bias (but, of course, he thinks it's justified).
Most of the people in my Twitter timeline have supremely sensitive sexism-dar, but are most of the people who visit the Random House Canada site going to feel the same way? Are they going to read Gilmour's words and think "Wow, they really exposed this guy for the racist, sexist asshole he is?" I doubt it. My guess is most readers will be nodding in agreement, pleased to have their own views reflected back at them, per usual. The irony will be lost on them. So why give him the platform?*
*Unless he gets fired. Then the joke's on me.
UPDATE: Gilmour's followup interview brought great joy into my life. It is hilarious. It's almost all worth it.