We garden, we raise chickens and have done turkeys, we try to stick with organic as much as possible. We try to have home cooked meals regularly, and snacks in the house include lots of fruit/veggie, nuts, etc....
and the kids will demolish the homemade (with extra eggs, less sugar, etc...) cookies faster than they appear, love the weekly fast food I still get because with working and 2 gyms, 2 orchestras, etc - well, at least one night a week I cave....
DS's old coach gave soda and pizza parties occ for new skills....DD coach does candy after at least one meet a year. Snacks are expected to be healthy at gym, but the coach continually has to remind parents, and DD often ends up eating someone elses "fruit" snacks, or questionable cereal bar versus her apples and peanut butter....
Last night (a late night for us) DD asked for top ramon for dinner - I said no because its junk and there are other choices. She told me "my friends eat it all the time..." We compromised with TR plus broccoli and hard boiled egg and milk...not ideal, but could be worse! Of course, I shouldn't have bought the stuff in the first place!
Frankly, I think the kids need plenty of re-enforcement of what is good for their bodies, but I also think its much more critical that they have a healthy sense of food being both for nutrition and pleasure (cuz it is you know!) and moderation in all....that will take them into adulthood healthier than never allowing a bag of chips.