Doing your own part as much as you are aware or capable is good, but if I were to try to avoid anything unethically sourced, I simply would not be able to participate in the modern world.
Do you use electricity? Do you have a cell phone? Have you ever used anything battery operated, like a flashlight? Have you ever eaten a hamburger? Have you worn a shirt?
Going around shaming people for things that are simply inevitably contributing to some unethical corporation is useless. We just need to agree that there is a problem, and do our best to make change.
I’m all for making personal commitments on topics you feel passionate about. But the fact is, that won’t make a difference on the grand scale. Only through government action is that possible.