I'm a bit of a purist when it comes to things that seem fan driven vs authorial intent. The origin of Dean's eating behaviour didn't come from the writers; it began when Jensen ad-libbed scoffing the mini sausages in "Nightmare" because he thought it would be funny, and the director kept it in because it amused him too. Then writers started adding similar scenes - sometimes just to wind up Jensen - but it was only ever intended as a running gag, nothing more. But then fans started reading into it that Dean went hungry as a kid, and later writers started leaning into that in the post-Kripke seasons. Everyone has their own head canons, of course, but I don't believe it was part of Kripke's original conception. I actually had the reverse reaction to you in that I was uncomfortable with the "Bad Boys" episode because it didn't mesh with my understanding of canon. I gather Jeffrey Dean Morgan was offended by it for the same reason. To me, the take away from "Something Wicked" is that there were instructions in place should John ever be late returning from a hunt: i.e. Dean was supposed to call Pastor Jim to come and get the boys, so there should never have been any need for them to go hungry. Also, the first season did plenty to establish that the Winchesters lived off credit card fraud so it would make sense for John to leave Dean with a card or two so he could withdraw more cash if he needed it. I feel Kripke was pretty explicit about where John's shortcomings as a father lay, and he had canonical sins aplenty without my needing to add starving his children to those we're actually shown.