Final answer:
It's dangerous to stand too close to railroad tracks due to atmospheric pressure effects and placing objects on the tracks can cause damage and safety risks.
Step-by-step explanation:
One should never stand close to the railroad tracks when a rapidly moving train passes, nor should they place objects on the tracks. Being close to the tracks can be dangerous because the atmospheric pressure created by a fast-moving train can pull a person towards it, posing a risk of serious injury or death.
Moreover, placing objects on the tracks not only damages the train and track infrastructure but also poses a safety risk; flattened objects can become projectiles or cause derailments.
Both actions go against the customs and etiquette of using rail services where safety and common sense play critical roles in ensuring the wellbeing of all passengers and the proper functioning of the transportation system.