It is stealing

A sushi restaurant installed a system to charge a customer based on the sushi plate that is taken off the conveyor belt. This is captured through a RFID device placed on the plate.

A group of students discuss how to prevent customer from "beating the system" by taking the sushi from the plate, and leaving the plate on the conveyor belt. The system will not be able to detect that the sushi has been removed.

The solution is simple. Put up a sign that say, "Removing the sushi from the plate is considered as stealing".

We should know the difference between stealing and "beating the system".