I see this too. I wonder if it's someone who's taking their "charity" to an extreme: if someone in need is buying a shirt at GW it shouldn't really matter who made it because it's the need that's being met by the garment (and not the maker).
On a similar note, I got reamed out by one of my wife's friends for flipping because I was depriving people of the opportunity to own what I was taking. She seemed to think that only needy people should shop there and that I was gaming/abusing the system. I did point out that, for something like jackets, I was only buying something like 1 in 500 jackets that I handled and that there were plenty of jackets still to go around.