Mate of mine had a butterfly on his left forearm...only showed when he opened the throttles on take off whilst wearing a short sleeved shirt...skipper went bananas and he had to wear a plaster....load of hypocrites...and this was in 1973.
Then we had a co pilot whose face had been badly burned in ww2... Now that was allowed...as was having haircuts that looked as though we had just escaped from Wormwood scrubs...