There are plenty of lists of “the worst cars of all-time” floating around the Internet. But we want to zero in on what we think is a more egregious failure than simply turning out a bad car. What separates bad (as in “worst”) from dumbest? In our judgement, the “dumbest” cars to be foisted upon the pubic are those that leave the would-be customers saying “What were they thinking?” These are the cars, and trucks,…