Collective morality

If you tell a group of people you've just met that you don't buy from businesses that use sweatshop labor, you will most likely be applauded without anyone asking you questions as to why you think what you're doing is beneficial. If you say that doing so actually harms people it is supposed to help, you'll most likely be called a heartless corporate hack.

Apparently, the rules of our society are such that it's much more acceptable to support an action without trying to inform yourself about its consequences just because said action makes you feel better about yourself, than to express an opinion that it might not work.