Re: The Later Lite Bombardment?
Low probability, but absolutely deadly and devastating. Disturbing the Oort cloud might divert more objects towards the inner solar system, but there are plenty already wizzing around to look out for.
The "human-caused" problems you list are slow-moving, unlikely to be as devastating, and are subject to changes in human behavior. A big rock on a path to collide with Earth will not be swayed by protesters or clever editorials.
Biting the hand that feeds IT
