Bah I can see both sides. Having worked with welfare/section 8 families, I know there are a lot of cases of parents with very little experience, support systems, or general knowledge of how to raise kids; not saying that applies to all parents in the programs. Allowing them to purchase sugary drinks and fast food only increases cases of diabetes, cavities, etc, which the state pays for, and the kids grow up with poor health that follows them to adulthood.
On the other hand, anyone who has been to an inner city or rural areas knows that grocery stores aren't as readily available as they are in other places. You can randomly drive around certain parts of Detroit and not find a grocery store within 20 miles. But you'll find dozens of fast food places and convenience stores. In a perfect world healthy food would be readily available, but that's not the situation on the ground.
At the end of the day food stamp spending is such a small portion of the budget that anyone who gets upset or outraged over seeing kids buy pop or energy drinks is an idiotic. And probably borderline racist.