locks

Yes, lockable doors and chests are planned, since they're quite important in multiplayer. Our plan ranges from simple keys and combination locks, up to keycards and keypads.

I think it would be neat if there was a creature, like racoon, reese monkey, or gremlin, that messed with your stuff if you don't protect your storage containers or at least keep it behind a locked door. They would possibly steal a single "shiny" or food item and disarrange the contents.
It would give additional reason to have things inside buildings and give purpose to these items outside of pvp activities.

Yeah that's really a cool idea! We put that on our list, unfortunately, neither a racoon (which seems to be ideal for this job^^) is part of our first animal update, nor a monkey or gremlin. We will implement this feature as soon as we have appropriate models. I promise that this feature will not sink into oblivion

Racoon would be hilarious