People may see the delivery robot driving, and may attempt to take the package from the carrier
Users could misuse this service to deliver illicit or illegal items
Over time, the obstacle detecting sensors may begin to degrade, putting the robot and pedestrians at risk of collision
Poor weather conditions could cause damage to the system, making it potentially dangerous for those nearby
If the system runs out of battery while delivering an item, it will be unable to move or alert the user
At the end of life, we will have to dispose of a battery, motors, and many sensors
The system shall not damage or contaminate the delivered item, especially if it is to be consumed