While it's nice to show support for things, it really doesn't need to be something that we bring into video games. People play games like Destiny to get away from life and relax, things like pink in October have their own places elsewhere. Never mind the slippery slope, starting to do some things like that can result in people asking them to do things for every sort of activist movement thing and getting offended when they don't. Nepal relief was one thing, it's a one time thing to help people in a state of emergency, an annual event is something entirely different. Pink shader? Sure. A pink shader (probably purchasable) for the sole purpose of supporting breast cancer? Not so much.