How did the kings and merchants of the earth respond when they saw Babylon's judgment?

When the kings and merchants of the earth saw Babylon's judgment, they wept and wailed over her. [18:9]

Why did the kings, merchants and ship's captains stand at a distance from Babylon at her time of judgment?

They stood at a distance because they were afraid of her torment. [18:9-10, 15, 17]