Which method is NOT typically associated with drug smuggling?

Public transit systems are generally not associated with drug smuggling because they are heavily monitored and regulated. While illicit activities can occur on public transportation, the risk of detection is considerably higher compared to other methods. The use of public transit is often not discrete, and law enforcement agencies frequently conduct operations to monitor and apprehend individuals who might be using these systems for illegal activities.

In contrast, other methods such as drones, high-speed boats, and postal services have been employed in various ways to facilitate drug smuggling. Drones can bypass ground surveillance and reach remote areas, high-speed boats can quickly transport drugs across waterways while avoiding law enforcement, and postal services offer a level of anonymity and vast reach that can be exploited for shipping illegal substances. These methods have proven effective for smugglers due to their ability to evade detection and manage risks more effectively than public transportation systems.