Personally, I think bread is alright in moderation. I use lite bread, no more than 3 slices a day. That's barely 100 kcals. As for fruit, well, I'm a fruit junkie. I have at least 2 apples a day, and then usually some grapes or honeydew melon or something. Fruit is VERY good for you.
Bars, on the other hand... They usually have a lot of fat, calories, or if they don't, they taste like straight ass. Plus, more often than not, they have a lot of saturated fat (especially low carb bars).
I believe, however, it depends on your goals on whether or not you want to use these foods. Cutting diets are obviously way different than bulking diets. It all leads back to the energy balance equation. You can use any of these foods, but if you expect to get anywhere, you still must abide by the energy balance.
That doesn't mean, however, that there aren't better ways to do things. Just keep an open mind.