Re: "they could simply stagger lunch 'hour' by a bit"
Also a very long time ago we had a fixed seating plan - tables of six, 5th or 6th former in charge of each (no separate 6th form college). Food prepared in batches for each table and shared out by or under supervision of the pupil in charge. No multiple choices, eat what the day's menu was. Any facial recognition was by the senior pupil on the table. If, fr whatever reason, you weren't having school dinner you wouldn't have a table.
Biting the hand that feeds IT
