If you are dissatisfied with your dining experience or have concerns about the food or service, it is best to address the issue with the restaurant management in a polite and constructive manner. They may be willing to listen to your feedback and, in some cases, offer a solution or compensation if there was a genuine problem.
Remember that running a restaurant involves various costs, including paying staff, purchasing ingredients, and maintaining the establishment. Dishonest actions such as attempting to avoid paying for a meal can have serious consequences for the restaurant and its employees.
Instead of trying to avoid payment, focus on having open and respectful communication with the restaurant staff if you encounter any issues during your dining experience. This approach will be much more beneficial and ethical for all parties involved.