Number 1 in my experience. Flag salute.
Maybe because of my age. I went to public school between '52 and '63. Felt like every morning of my school years the room went dark and a big spotlight focused on me during my non-saluting of the flag. Then the SOB's in Brooklyn decided you should not stand for the Anthem either. Then I had to deal with that a couple of times in some very uncomfortable public and job situations.