Rather to my surprise, a couple of years ago at a very wet CDG I went through check-in, general security and gate security unmolested with a large, pointy golf umbrella. I stowed it overhead in the Air France cabin. On **disembarking** at JFK, the AF cabin crew tried to take it off me as I exited the aircraft, saying it was "outrageously illegal" that I had brought such a dangerous object on board.
Go figure. Maybe they didn't like the look of the weather in New York that week-end....
AGB