Here is a lesson in traveling etiquette: the middle seat gets both armrests. At the very, very least you don’t LEAN OVER SOMEONE ELSE TO WATCH YOUR IPAD. I mean, the aisle is on the other side of you! Lean over toward that!! You, sir, are an asshole. At least the TSA only looks and (typically) doesn’t touch!!!
My plan of action, giving that pointed elbow jerks aren’t working, is to lift my arms above my head and rub my armpits on him while fiddling with my light.