Like boycotts have and do work. I think the problem is average/majority user does not quite understand the minutia.

Successful boycotts seems to deal with worker mistreatment, racial discrimination and other unethical behavior that a business may be doing. Even then they are not always successful but it certainly is easier to explain the situation to people in those cases. However, still run into issues like it is too essential like food or just too much apathy for the entire market of that product.