Shields - can "visually" block with them

This is a minor thing, but could possibly confuse new players If you are holding a shield, and have an axe in your main hand for example, you can "block" with the shield, but I'm pretty sure it doesn't actually reduce incoming damage. This is intended to my knowledge (not reducing damage) as it's 1.8 pvp, but in that case, it doesn't really make sense that you can block with shields at all. Sword blocking takes priority over offhand, so I don't think holding a shield in offhand while sword wielding in mainhand puts you at a disadvantage. I do think either removing shields entirely (i.e. can't craft or obtain them), or disabling the ability to offhand them could be a consideration (I see new players holding a shield as they aren't aware of sword blocking)