Ah, no - the question needs to be much more specific. Everyone will answer yes to that question
On the spot, I wouldn't think so. If Mr & Mrs No-Status approach the line and get asked a question they don't understand I'm pretty sure they're more likely to look dumb and pretty than give a definitive "Yes". It's not practical to fire off every single status to each approaching passenger, and if a few sneak through, it's pretty easy to turn them back once they reach the front of the line.
The point is, the line needs to be policed, but it needs to be done tactfully instead of with aggression. To accuse each person who is using the line of breaking the rules is not the way to do it. Over time, when people eventually figure it all out, I'd say the need for any policing will reduce (and any violaters can be sent away as they reach the scanner).