Generally weight-loss schemes don't involve unfounded accusations of large-scale fraud and calling people liars who risked their lives in the exploration of space. Neither do they impugn the honor of an entire industry, in which I once worked and in which I still have many friends. Instead what you mention falls generally under caveat emptor.

Sell someone a sugar pill or a "balanced resistance coil" (i.e., a helical spring) at an exorbitant price and tell him he'll lose weight, and what do you get? Someone who's just as fat and somewhat poorer. Eventually, if he's smart, he'll quit buying the stuff.

Plop a kid down in front of the Fox program and what do you get? Someone with a distorted and factually incorrect understanding of logic, science, and history, some of which will stay in his noggin for the rest of his life.

Yes, it makes me a bit angry to see ineffectual products being greedily sold to a trusting public. But I talk about the moon hoax theory because I believe there's more at stake there, and primarily because that's where my expertise lies. I assume that there are qualified dieticians out there to debunk the latest weight-loss fad, if they feel the need.