What are the implications of not properly securing passenger baggage?

Not properly securing passenger baggage can lead to in-flight hazards. When luggage is not secured, it can shift during flight due to turbulence or abrupt maneuvers. This shifting can obstruct emergency exits, pose a risk of injury to passengers and crew, and lead to items striking passengers if they become dislodged. Proper baggage handling and securing are critical for maintaining order in the cabin and ensuring the safety of everyone onboard. The weight and balance of the aircraft can also be affected, which is crucial for flight performance and safety.

The other options do not accurately represent the implications of improperly secured baggage. For instance, it does not enhance aircraft speed or reduce weight, and it is far from insignificant regarding flight safety. Thus, the emphasis on preventing in-flight hazards highlights the importance of diligent baggage management.