You know, I'm not going to post I feel sorry for you, never have on these threads (you can look for yourself). Most people will not tell you the honest truth (shout out to the 5% who do) I'm direct and blunt. You have you, yourself alone to blame. You should have set the FC permissions properly to begin with. Everyone thinks its the cool thing to be the FC leader - it's not. It appears you (may) have had a house also, you are lucky they did not demolish that also, which they could of if your #2 had that permission.
GM's will NEVER, I repeat, NEVER do anything about these situations. They had the permission to do it in SE's eyes. Where did that permission stem from? You, the FC leader, which in their eyes, is saying you gave them permission to do so (along with what everyone else had access to in permissions).
I do agree, though, that SE should fix this issue about promoting/demoting, they have largely been silent on it. Instead of filing a GM ticket everytime this happens (huge waste of your time), maybe it would be more productive to get a thread started trying to get SE to make an official response about fixing this permission?
P.S. give up the shaming and naming game. It is -extremely- hard to do in this game unless you copy down their lodestone ID (which most forget to do before the next step I'm about to say happens). You can freely change your name and appearance and name at a snap of a finger. What're you going to do then if you don't get their Lodestone ID before they change their name / race?
Going to make this as a bullet in case anyone happens to search in the feature! Since this is current as of this posting.
1) SE will never do anything about "someone had access to this, but they took an item I didn't want them to take". Why? You gave them the permission to that box / item / whatever the case may be.
2) Instead of filing a GM ticket (telling you now, you are wasting your time, despite popular belief on this forum, and why would you want to do that?), create a productive post and try to get a official response from SE (which no one has done to the best of my knowledge, I know shocking right?). Search all over this forum and I bet you cant find a single post where they actually restored someones items from this issue.
3) Set your rank permissions properly. It's not a cool kid thing to be a FC leader. You have actual obligations (one being to set the permissions right).
4) Refrain from name shaming, unless you have their unique lodestone ID... otherwise, you, again are wasting your time (again, if you did the first part of step 2).
5) Move on and rebuild. It really isn't hard to make 95% of the furniture.
Till the next thread about this same issue (because no one will step up and do #2)~ Have a great morning!