They are strangers presenting themselves to some official and if you they have to be off loaded or detained, fine, what's the big deal? Sorry old fruit, you clearly have little idea what customer service is about and need to get out more.
Any issues, often innocent enough after investigation, would result in someone being escorted off the aircraft and a delay ensuing while their bags are found. I would find that humiliating. This is why there is a space behind you at Immigration so that if there is an issue you can be spoken to professionally without a private conversation being broadcast to all and sundry.
Think of the British Minister denied entry on an official visit to Washington. Twice. Did I mention he was a Muslim? Massively humiliating in any circumstances, being taken into custody and led off a flight would be crushing to anyone. That sir, is a big deal to anyone and I urge to think before you slag off a good and reasonable objection to your hare brained scheme. Customer service has to ba balanced against real other needs.