I don't understand why you wouldn't restricted the access. My FC is very small, only 19 members at the moment, and pretty much everything is restricted even removing crops from the garden has to be done by me or one of my officers to ensure nothing untoward happens. Mmorpgs are rife with scammers and thieves and some of them will stop at nothing to get your stuff. My FC have collected a nice amount of gil in our FC chest which we use for FC crafting, we used to use it for relic weapons and materia as well and stuff that may crop up as and when. A scammer joined our FC and noticing the amount of gil they decided to try and dupe me into getting it. It started very subtly with them commenting the FC needed redecorating and we could use our gil to do, following this they tried to get themselves appointed as our 'decorator'. Luckily I wasn't born yesterday. Basically my point is not to trust anyone too easily especially if it involves hard earned loot gained collectively.