Maybe you can’t judge a cupcake chain by its abysmal scones. But the news that Crumbs up and folded did not surprise me, not least because the chain had already been retrenching and fudging why. You can get by with mediocrity in the food business for eternity. Crappy will kill you. But the bigger lesson: Mom&Pop, don’t let your startup grow up to be taken over by the likes of Bain capitalists. Just as I suspected, when the going gets tough, they’ll dump the debts, sell the assets, and only the little people get screwed. Maybe the Food Network should consider a “Zombie Bakeries” show, cast with some screwed-over Twinkies types. Anyway, banksters are never the best judges of either portion size or how much overkill the market can bear, so I do hope the quick-buck guys are heavily invested in froyo. Half the storefronts on the Upper West Side would be open for real businesses if that oversaturated concept had a meltdown.