Player: I have a shield that is 2 ft by 4ft
Dm: ok...
Player: So I angle the shield to block the incoming arrows
Dm: ok...
Player: So do i block the arrows?
Dm: *mutters* So it adds 5 to your ac...
Player: huh?
Dm: the arrows hit, dealing 7 damage to you
REAL LIFE; D&D; WHY SHOULD I EVEN WEAR A HELMET? WHEN BIKING OR SKATING, YOU NEED TO WEAR A HELMET! IT LITERALLY DOES NOTHING! IT CAN LITERALLY SAVE YOUR LIFE!