Before you shoot this down, a little explanation, on a server i had my base stolen from (PvE server with no steeling rule) my base was completely code locked and still had everything of worth stolen. I reported it to admins and they are investigating

Just by acident i was doign somethign around my base and noticed that i could loot a medical box though a wall, thought this was odd so i put a wooden box on the floor next to it not touching the wall and same thing. i looked around my base and every container that had items stolen from where right next to wall joins

with the correct possition you can loot containers when they are close to any wall/floor joins.

Looks like there needs to be some work put into preventing this behaviour or no base is secure when using BBP walls, foundations roof or floors and containers near external walls