The sorry history of homophobia in gaming is pretty well documented, so it's probably not a coincidence that a campaign to discourage anti-gay remarks includes a gaming piece among its poster ads.
ThinkB4YouSPeak, which hopes to raise awareness about anti-gay bias in America's schools by reducing the use of homophobic language, explains its mission at its website:
Lesbian, gay, bisexual and transgender (LGBT) teens experience homophobic remarks and harassment throughout the school day, creating an atmosphere where they feel disrespected, unwanted and unsafe. Homophobic remarks such as “that’s so gay” are the most commonly heard; these slurs are often unintentional and a common part of teens’ vernacular. Most do not recognize the consequences, but the casual use of this language often carries over into more overt harassment.
The poster at left substitutes the commonly heard "That's so gay" with "That's so gamer guy who has more video games than friends." Stereotypical? Of course. But that would seem to be the point. Other posters include jock and cheerleader themes.