As you can see from the stories, the companies itself did not do anything bad. Except, in some cases, being ignorant. And it hurt their brand. Also, fixing this issue is neither easy nor cheap.
Most of us do not work in these huge companies. Our suppliers may not create so much trouble. Still, if a tier-2 supplier has a bad quality product, it will impact your final product. If he has a bad reputation in the market for making bad products, your brand may suffer as a consequence.
Pay a visit to the major ones, at least once a year. See if everything is as it is supposed to be. And insist on removing them if something is wrong. You have the right to do so.