While I agree that shopping isn't the solution, people shop. From the perspective of a person trying to promote healthy change in the world, it makes sense to increase awareness and promote positive change by infiltrating a favorite American pastime such as shopping. Perhaps the people that become "involved" (even if it is by merely buying a T-shirt whose proceeds go to support a cause) would not have become involved otherwise. So, I agree that shopping is NOT the answer, but perhaps these T-shirt companies are helping to spread awareness of social and environmental issues to the masses of people who might not have had the impetus to give a damn otherwise.