It takes denial of entry, not the pax refusal to comply with law. In other words, TSA boots someone because they are on "no fly" that's a reason. TSA finds firearm in hand luggage and turns pax over to LEO, that's a reason.

If the pax says they don't want to complete approved inspection (remember, there's opt out for those what don't like the machines) that's definitely not a reason.

Has to be that way becs. it would simply be the "out" for every pax who holds a non-refundable ticket and wants a refund.