Hi. It is problem, that players have a lot of twinks (some of this just for keys storaging). So, I think it will be great, that make a RUNE CODE LOCK. With code of 4 RUNIC letters.
Coding process:
Player craft the code lock
Player attach the lock to the gate/door/cupboard etc.
Player set the password to the lock
Player say password to his village members and they can get out/in anytime, one time entered the password. Any player, who have a password can re set password.
Criminals can hack the password, by use difficult shamanian magic/rituals.
Sorry for my english.