Quote: Mr Dog "Pretty sure the the flag is still classed as touch in goal if the ball hits it whether or not in a player's possession and the 'not touch in goal' rule only applies to body contact with the flag. The corner flag is still defined as 'touch in goal' in the laws of the game.'"
I think if the ball is kicked and hits the flag then yes, it counts as being dead in goal. But if a player is in possession of the ball then the flag is essentially ignored. Bit of a weird rule but it makes sense in my opinion.