• Crafting a named key / lock with a blank key / lock to copy this item
• Placing lock on anvil, wooden door, etc, to forbid others to use this block

Locked doors is on my to-do list since I need to special case them. I see no point locking anvils or most other vanilla blcoks. For any blocks from mods they just need to implement the relevant vanilla interface

Probably will not do key/lock copying by crafting, I like that it takes XP to craft them and it makes it feel more like locksmithing. Note you can name multiple keys at once.

Because you really "consume" the anvil when using it :)

Eh, it's more effort to support anvils then it is worth. Besides, if i place a little lock on am anvil, is that really going to stop someone from using it? It's a giant hunk of metal.

OK it makes sense