Recently during our test we found that the couriers seem skip the checking of the lock on the chests.(Locked by the Lockette plugin). 
They could easily remove any items from others' chest and inventories without any record, which means Coreprotect plugin could not lookup and rollback such operation.  
Is there any method in AW2 existed to avoid this? If not, perhaps it would be favorable to add some new issues like check the owner and scoreboard team in every work tick of couriers, or add an item used to claim the owner (i.e make AW2 inventories&NPCs campatible to Lockette) etc.
Sometimes sentries could help, but most of the players would be Neutral, so that others could easily get into their base without any resistance. Even if everyone is not neutral, simply killing all the player owned NPCs could lead to a disastrous loss.
BTW, an NPC would sometimes be stuck by a fence or pane. Perhaps because the pathing would ignore the block the NPC is currently on. Also NPCs usually have difficulty with path-finding within a