No social movement in history has ever been powered by people being considerate about their consumption patterns. I'm not saying it's a waste of effort, but I am saying this is unlikely to be sufficient to any cause. In fact, I'd posit that it has a far greater (and largely negative) impact on your life than it has a positive one on other peoples' lives.
To pick an extreme example, should you steal something that's lying out in the open in a dodgy area because someone else will if you don't? Some things you do for yourself, and an action isn't required to have an effect for it to be moral.
