[AAABEST]

Nice mini-novel. You should entitle it "The Utter Failure of Checkpoints."

Both examples you posit show how checkpoints didn't do a thing to prevent death or injury from via drivers. In fact, regarding your first example, one could argue that the checkpoint indirectly caused the accident.

[MacMattico]

Did you read the whole thing? Many hundreds, perhaps thousands over the years have been stopped at checkpoints. I pointed to the carnage of just two that got through.

[MacMattico]

Let's hear your story on how a police car parked on the side of the road caused a drunk to hit it.