When I first read the headline I thought they were going to replace the three colors with the seven colors of the rainbow all meaning different things.
That would have led to lots of death and destruction in auto accidents, which would be a clever, if painful, metaphor for the gay "lifestyle".
My first thought upon reading the headline was that all the lights of an intersection would be red at the same time, yellow at the same time, and green at the same time rather than celebrating the diversity of red for one direction while the other had the green.
Diversity...IS dangerous isnt it!