Bingo. If anything, use of a burner phone will be purposely misconstrued as “suspicious”, and used as justification for more thorough screening.

“You just got it last week? That’s weird, we usually only hear drug smugglers using new phones. You’re not smuggling fentanyl, are you? OK, so you won’t mind if I take a look through your luggage to be sure, right? Maybe I should send you to secondary screening for an x-ray.”