I've seen several posts around complaining about FCs getting stolen from and the typical response from SE that there is nothing that they can do about it. And while I understand SE's side it's a bit ridiculous for multiple reasons.

-A large part of the problem is due to flaws in the rank/permission system.
-This is such a problem because SE won't do anything about it, people know that they can loot a FC before they server transfer and they won't ever have to pay for their actions so they just do it.
-There isn't a setting to limit the amount of items that can be removed from the FC chest tabs which would also prevent much of this.

Typically when people post about being looted or vandalized the response is to attack the victimized FC instead of saying anything to contribute to the discussion. In order to prevent this in this instance I will tell you that my FC was recently vandalized and looted. This happened even though we had the permissions for such things extremely limited (only 6 people in the entire FC had any kind of access to the options necessary for such action, only 3 people had complete access to the chest or the ability to promote, and only the FC leader has the option to modify rank setting), so this was not a case of poor privilege management.

tl;dr FCs get looted largely because SE won't punish the thieves. Post here to try and get them to take action.