Only in the worst cases. Companies like Walmart consistently abuse their workers, ruin neighborhoods, ruin the environment, and drive product quality into the ground seeking lower prices. As I view top quality at full price a better value than things that are going to fall apart, ruin other things, or do a very poor job despite low prices, I would rather buy things that are more expensive and last longer anyways. All that means I will not shop Walmart unless absolutely necessary--and that they support ruining the demographics of the whole planet via their ads is just one more reason not to go there.
And there is the Top Ten list for supporting a certain country that no one is supposed to criticize (hint: it is prominent in the bible and quran). And, in general, they all make products that are junk. General Electric, at the top of the list, used to make decent products. You might have a GE appliance of 1950s vintage that has more life than that new GE appliance in the store today. Because of this, and because their quality has gone down the toilet so much, I will not buy anything GE--unless it is some antique from someone that happens to have a GE washer of 1950s vintage.
The other companies on that list are Coke, Pepsi (including and especially Starbucks, a subsidiary of Pepsi), McDonalds, Nike, Nestle, Intel, Motorola, Hewlett Packard, and Kimberly Clark. In the case of Coke and Pepsi, their products are full of high fructose corn syrup or aspartame. Nestle loads its products with monosodium glutamate, and I do not trust them not to put neotame in their foods (plus they ruin the environment so badly). HP and Intel produce rubbish products--but have fun buying a non-HP computer with a non-Intel processor (my computer, bought in 2006, is HP but with AMD processor and I am doing all I can to make it last as long as possible). Motorola is also rubbish. Nike and Kimberly Clark both charge full price for junk. As for Kleenex, I prefer a store brand and it does just as good.
Switches? I rarely drink soda at all--and I am more inclined to spend more for a soda that has real sugar, and does not come from Coke or Pepsi (or Royal Crown, for that matter) instead. Instead of McDonalds, you are better off going to Wendy's (and it's not just because "Where's the beef?") or Burger King (or, simply, going less often or not at all for fast, good-tasting poison). HP makes rubbish printers--I have one that simply will not come on (Epson is better, but still not perfect). I shop for L.L. Bean shoes instead of Nike or other high-priced shoes (they are about the same price, or even a bit cheaper--a surprise for such high quality). Better quality instead of a bigger name. And instead of Nestle, I prefer Hersheys, Mars, or some of the smaller companies that import chocolate from Germany.
And no, I do not waste my money on Gillette products. Disposable Bic razors last just as long (single blade razors are almost as good as those 5 billion blade razors), for way less money. They cost around $4 at full price for a pack of 10, instead of $20 or more for a pack of 4 or 5 Gillette.