Now I remember that thread from not so long ago where a player reported a guy who stole from their FC chest and then left. And people were all like 'Haha your fault, the leader's fault, why give permissions' etc.... And what when leader fucks the entire FC over? Then what?! Ugh.... Idiots.

Report, and hope it gets fixed. Or just mind your business since you left. That's what you can do.