Say "no" and miss your flight is different than sitting in your car. They use that against people.
How many terrorists have been caught in these unconstitutional Nazi style road stops?
The checkpoints are looking for illegals. You know that as well as I do.
Similar to when they raided meat plants and removed illegal workers up till the plant nearly closes costing millions in lost revenue, farmers lose a buyer for cattle, pigs, chickens etc.
Then they stopped the sweeps.
Funny how things work.