The laws vary a lot so check what applies for you http://www.freerangekids.com/laws/
It's not very hard to make breakfast or lunch, and any issue that would need a parent to solve is probably something they would have to call 911 or bring us to the hospital for anyways.
Actual text of the law implies a lot worse neglect than the website interprets. In fact if you turn it around it seems shocking. A guardian can leave a 15 year old without regard to their health & well being.
Utah recently had to redo some similar laws to prevent them from being abused.