10,985 votes and 764 comments so far on Reddit
Im not defending these idiots, but the fight is never over the actual item.
It maybe starts that way, but escalates to being about something more. Name calling or pushing or whatever.
Whole thing absolutely stupid. But its rarely Im taking the last of this item, fight me if you want it
Edit: yes there are a few times its actually over the item. But usually its not. Its a respect and ego thing