Minecraft wiki entry for Player_versus_Player, associated text: There are certain damage methods that ignore one's armor. For armor without protection enchantment (or Feather Falling), it can be falling, fire, drowning, potions, suffocation and certain monster attacking methods (such as the evoker). Even for players in protection enchanted armor, you can still penetrate them by somehow tiring them (make a non-lethal trap that forces jumping and sprinting, unleash some husks or destroy their food source) so they will starve and be weakened while you are full, or by knocking them into the void. Arrows of Harming shot by a Piercing Crossbow ignores both Armor and Shields and deal up to an incredible 12 × 6 damage. In some servers, the admin may set up a trap made of /kill, these will kill anyone even with the best armor (probably except for the admins themselves). Also by exploiting glitches or using super fast knockback (see below), one can trick the enemy so they will be thought of as illegal flying or other illegal actions and get kicked, effectively killing them. This is very dirty play, and is considered unsportsmanly and/or can get you banned/suspended. In other words, exploiting glitches is NOT recommended.