Pretty much, kindof. How's that for an ambiguous answer? Things like refined sugars and refined flours are never good and should always be avoided. But take that a step further. If the food product is nutritionally deficient, should you eat it? If you pay attention to what "food" is in your food, you'll be just fine.
Here's a link to the Atkins food pyramid. This is what your eating should look like when you're on maintenance. I will admit that for the most part, I've flipped the bottom two tiers, but that's just me
Food Pyramid