I use my laptop. Thin privilege is being able to add a 6 inch barrier to your seat while still having enough room to get comfortable and fall asleep.  Bonus points: leave your tray table down when you get comfy, that way if you dose off you'll still get snacks, and you just know the obeasts will salivate when theirs are gone but yours are within reach, untouched, yet they can't have any. Double bonus if they think you're asleep and they try to grab for them. Then the shaming begins.