Or, you as a parent/guardian can BUY the child HIS/HER lunch using YOUR own money; effectively telling the school to leave you alone, because you can afford to pay your own way, and don't need to abide by their SILLY rules.
Otherwise, let the school take the kid's picture and he gets the FREE (taxpayer funded) lunches.
If you observe a religion that requires you to AVOID having your picture taken, send the school a letter telling them you object to the picture policy on the grounds that your religion requires you to avoid taking images of yourself and your children.
The school will either discuss it with you, and you repeat the same thing, eventually the kid will be given an ID card with a picture of the school mascot, or the words: NO PICTURE REQUIRED DUE TO RELIGIOUS OBJECTION.
SHEESH.....