Has anyone any experience, or advice, in respect to listening to a scanner aboard a US Airlines domestic flight? I tried to find some policy at their website, but came up empty. I am trying to avoid checking my bag. It's small enough for carry on, but it will have my scanner in it. Even if I can't, or don't discretely monitor it while in flight (if anything to hear anyway), could it be considered suspicious enough that I may get a hassle?