There are two aspects to this thing, which I guess you could refer to as the personal and the political. With "personal," I mean that we, as dudes, could all encourage more girls/women/womyn to skate and be supportive when they're at the session/park/whatever, and do our best to not objectify them and simply treat them as another skateboarder enjoying the thing that us dudes enjoy. That's the easier part (getting a million skatepark idiots to stop saying "faggot," "gay," or "nigger" is another story).
The more difficult thing is to address the "political" aspect of inequality in skateboarding, and to be fair I'm not even sure there IS a way to address this. Sure, really, truly, exceptionally talented lady skaters will appear from time to time (and, to be honest, maybe more so now than at any time since the 70s) and get the coverage they deserve; I'm thinking Elissa, Jaime Reyes, Nora and Lizzie, Laeticia Bufoni, Amy Caron, Vanessa Torres, and those little girls that Tony Mag hangs out with who can do 540s. But they really are the anomaly as far as "talent" goes. This might come off as misogynist, but I what I mean is that there is an objective disparity in the talent pool between male and female in very many physical activities. I dare you to dispute this. It's not fair, it's not cool, but gender dimorphism is real and the fact remains that, on average, dudes will be more physically capable (on AVERAGE, not always) than ladies. And if skateboard magazines want to highlight the best skateboarding that's going on in the world, the majority of the time it will be done by dudes. Women are of course capable of ripping and of getting well deserved coverage, but when someone demands diversity in coverage in skate mags (or for that matter wonders why more female skateboarders aren't being heralded in Rodney's TED talk as "innovators") just to ensure that both genders are represented more equitably, then you've got an affirmative action scenario on your hands, which makes things even stickier.
I doubt there's an easy solution to this, but I skate with several ladies and they're fucking awesome human beings who genuinely love skating every bit as much as I do and I see them as skaters/friends more than as ladies. Although they'd probably be the first ones to admit, objectively, that they're not quite as good as the dudes. Fuck it. Shut up and skate.
Also, I like boobs.