What if having others present at the time of using the items is a way for others to acknowledge that "hey we are a fc doing a fc project. persons 1, 2, and 3 personally took the time to gather/craft these materials, and we are here to make sure person 4 doesn't dump them into some project that persons 1-4 or our fc as a whole agreed upon." Maybe its like this so one person doesn't screw multiple people over who took the time to get the turn ins? Who knows maybe we should be thankful? I know I wouldn't appreciate someone just dumping lots of DS nuggets away for example.