I've noticed a spate of schemes to raise money on Kickstarter, Indiegogo and through more traditional avenues that involve claims that are essentially physically impossible. A rudimentary due diligence investigation by an expert in the field would debunk the project very quickly. Examples include solar cells a few inches in diameter with a mains receptacle, a device for charging your cell phone based on coffee or beer mug temperature difference, and a keychain scanner that purports to be able to detect nutritional content and trace compounds in foods. In some cases the principals may actually be scammers, but in others they are marketers who can claim ignorance of engineering or science (yet are marketing a tech product that does not have anything close to a working prototype). They could even be experts in some facet of the required technology, but ignore other essential parts.
Is there a pithy term for such operators?
Scammer or rip-off artist do not not quite seem appropriate because they imply an intent rather than ignorance (or willful ignorance).
If no such term exists, a coined term would be most useful.