Final answer:
Generally, the answer is false; walk-up guests should not be serviced in the drive-thru due to safety concerns and the drive-thru being designed for vehicles.
Step-by-step explanation:
In general, it is false that it is acceptable to service walk-up guests in the drive-thru. Drive-thru services are typically designed for vehicles, not pedestrians, due to safety concerns and operational efficiency. Fast-food restaurants and other businesses with drive-thrus have specific protocols to maintain a safe environment for customers and employees. Moreover, walk-up guests may present safety risks as they are not easily visible like cars, and they can potentially be hit by vehicles using the service. To ensure the safety of all patrons, walk-up customers should be directed to inside service areas where their needs can be met in a safer, more pedestrian-friendly environment.