Earlier quoted context omitted.
> when you enter a courthouse > you have a choice whether to enter them Not necessarily...
True, though the security concerns of weapons in a courthouse surely justify a baggage scan, metal detector, and pat down. Security is far more of an issue in a courthouse even than on a plane.
I also agree that, in practical terms, security at a courthouse faces many more real-world challenges than air travel.
That should tell us something about appropriate levels of security.