Don't be so quick to kill the people going to the mall, brainwashing of modern society is not easy to resist; they don't need to be shot in the head, they need a strong government who will not import useless plastic crap (an unlikely scenario, but still possible) and we need to raise awareness about shopping uselles products. If you kill thousands of "mall shoppers", you will not solve the problem because another million will replace them. The cause of the problem needs to be solved (or at least reduced), not the effect.
There are some countries where such products aren't bought in such a large scale because people are raised by their parents (and society) to be reasonable and not totally hedonistic. This may seem to be too idealistic, but is still possible. If you raise your kids not to be like "mall shoppers", perhaps others will start seeing the benefits of that.
Leave the bullets to fight the external enemy who forces your country to import their crap, and arrest the internal enemies who support them; ordinary people can be swayed by law which regulates such products, since they are so easily manipulated.
Don't kill the sheep, kill (or imprison) the people who manipulate them to be bad sheep; we need people who will turn them into good sheep (so to speak).
Or perhaps I am just too naive and idealistic...