I don't think anyone was saying that it is our responsibility or that we have some sort of duty to report the contents of a particular package. Scratch relayed some scenarios where it was simply better to deliver the pkg no questions asked. The OP was simply inquiring as to whether drugs are sent through our system.
Now, I do believe that UPS, or any other carrier, has an obligation to cooperate with the authorities if a suspicious package is found in our system, but not to the point where it puts any of our employees or mgt in harms way.