I don't blame any kid who goes and takes the money their parents gave them for lunch and goes off to get a bite at a fast-food joint. Or even better, bring their own lunch.
The reason is because the food my high school served just sucked. What's even worse was that you couldn't afford a good meal. ($4.00? Back then it was tough for parents to give their kid $2.50 a day. I had to rely on just $2.00 when I decided to order lunch.) Calazones were probably the ONLY good food they served and those sure didn't last long. Plus that's all I could afford to eat. No drink or anything else.
There were vending machines with Lunchables in them, but you had a hard time getting the meals out. Basically, you would have to put the money in and then open the sliding door to the meal you wanted, and they were VERY difficult to open. Most of the time, you just ended up wasting your money. (Oh and did I mention you needed EXACT change? Yeah, that sucked too.)
I spent my Junior year pretty much eating a home-made meal. It was mainly due to the fact that I had a class that was at another place and had to take the bus to get there, which came during lunch time. So I seriously had NO time to wait in line for a meal.
I didn't go out to eat during lunch until my Senior year. I had gone to the nearby bowling alley and they had good meals there. Sure it was only stuff like hot dogs and sandwiches, but they tasted much better than the crap my school served. Plus, you could actually afford it. It cost less than the $2.00 I was given for money and it was great.

The idea to eat out during lunch has grown in popularity at the school I went to since I graduated from it. On my off days I drive by there and I see plenty of kids (probably half the school if I had to guess) going out to the Carl's Jr or McDonalds nearby. All because it tastes so much better. (I've actually tried Carl's Jr. I can't complain about the taste.)
If this keeps growing, maybe it'll give the school the idea to actually serve something good for a change. Not to mention make it affordable. It would be worth it.