Former Air Marshal
Former Air Marshal here. I never saw anyone join the Mile High Club but my buddy Chuck caught someone by themselves.
Chuck is just sitting there watching a movie and he notices the guy next to him put his hand under his blanket. He doesn’t think anything of it. Next thing he knows the guy starts moving. Most people would just pretend it wasn’t happening but Chuck is someone with no concern for social graces. He hit the guy with his book and loudly said: “what the heck are you doing?”
Story credit: Reddit