I can't completly agree. I had assigned seats when I was in school but I've never heard of assigned lunch seats. Unless this school has a major gang problem I don't see the point of this rule.
I mean no personal offense with this answer to your feelings about rules:
1. Homosexuals dont see the point either about natural laws pertaining to holy matrimoney
2. Abortionists dont see the point about their murderous practices
3. The 9th circuit does not see the point in keeping "under God" out of our nations pledge
4. Illegals dont see the point of immigration laws
I can go on, but my POINT is, that rules are implemented for reasons. Children need and should have rules, following them whether they "agree" or not. I APPLAUD this school for treating children for what they are: CHILDREN WHO HAVE YET TO UNDERSTAND THE "POINT" OF OBEYING RULES.