Re: I think the real problem is...
You beat me to it.
Notice it doesn't ask, "what if it screws up N% of the time?" or "what if it wrongly identifies you?" or "would you support strict limits if facial rec. wrongly identified and caused X people per day to be detained for Y minutes/hours?" and "what if one of those wrongly identified and detained caused a delay to your flight?"
They did not ask as they know the results, if it becomes personal, then no one would want it around. if it caused them to miss a flight to see the grand kids they would be right pissed.
I have always had a healthy skepticism of the accuracy of "online" polls. Since most of us just ignore them and only those with nothing better to do will fill them out. But I am SURE it must be reflected in the margin of error.