I never understood the argument against Infowars based solely on the products they sell. The majority of items they promote are just a white labeled version of stuff you'd see in any health foods store and are recommended by a lot of different people in the health space.
Main difference I can see is that some items are marked up quite a bit, but if their audience wants to pay a premium to support them then what's the issue?
Maybe the people your talking about would rather swallow overpriced ineffective pharmaceuticals that offer nothing more than devastating side effects, as opposed to overpriced health supplements that they could actually derive benefit from.