A lot of the stuff you mention are lesser of 2 evils then anything else.
Baked potato is better for you then eating french fries. While it doesn't have massive nutritional value, it's still something that fills gaps in a meal.
I agree with Diet Soda being bullshit. If you want to be healthier, stop drinking soda altogether.
Rice is neutral like the baked potato. It fills space while not being terribly negative.
Crackers are quite often bad, though pretzels are okay. Again they are a lesser of 2 evils. You could be eating well worse snacks then pretzels.
Juice is pretty brutal, but in most cases better then drinking pop.
Frozen Yogurt is a better alternative then ice cream. It's not healthy, but it's also not as detrimental as the alternatives.
If you eat salad instead of a burger, which is better for you?
And energy bars are total BS.
I don't think berating people's choice in food does much good. Eating healthy is all about making the less detrimental choice as most of the time you don't have the best options layed in front of you.