People consume bad products because they are in bad circumstances. Maybe they are too stressed to cook and can't afford a healthier alternative, and then become addicted to the sugar content (McDonald's), maybe the company has a monopoly on something people need for work and school so people have to buy it (Comcast), or maybe human psychology makes us susceptible to certain kinds of deception (Fox News).

Claiming that a product can't be bad if people consume it is incredibly naive.

You raise an interesting point. Do people consume things they know are bad because they want to or because they are manipulated to?

And here's Stimpy with the red shiny history eraser button...

I am ashamed that I had to look up this reference.

I should probably be ashamed that I brought it up :)

Because they are laced with a highly addictive substance? Why else would HFCS be added to fries or a burger, to make them sweet?

Because "bad" outside of context is utterly meaningless.