I've been having problems with ants being able to loot my containers from long distance. 

 

You can see here an ant has the thief symbol over her head: 

 

And she's actually stealing from a chest on the platform above (you can see the shadows of the chests) but they're way up here: 

 

I've also had cases of ants getting to my chests through walls, which is why I tried putting them on a raised platform to try and protect them.

 

So there definitely needs to be some sort of adjustment here, so that ants can only loot when in physical contact with the container. 

 

 

This is actually already in the issue trello so they already have this in there investigating

yep this is in the known bugs thread they're looking into.  Great screenshots though!