Also, this isn't the first time this has happened. It wasn't this bad before it was just moldy cheese and some expired stuff but he's also has a history of leaving his pots full of cooked food on the stove overnight. One I went into the kitchen and smelled something foul that nearly made me wanna puke and was trying to figure out wtf it was and I figured out it was his pot full of shrimp Alfredo he made that went bad... The thing is that he also cooks ALOT. like every meal he has at home is cooked immediately so I definitely believes he just forgets about them. But whatever, his mad at me for throwing his crap away, if he wants me to replace his containers I don't mind doing it but I am NOT living with f***ing mold.
First off:
A) Glad you threw that shit out. There should be zero tolerance for rotting shit next to your fucking food
B) Also good- talk to this dude directly; none of this usual Era/GAf pushover OP business where they refuse to confront someone over a very real, serious issue.
C) Don't relent; the mold dude is in the wrong, not you. And so is your friend for being so nonchalant about it, owner of the house or not.
D) If this is a common occurrence (leaving rotting food out, etc) create guidelines and consequences where the owner friend has clearly failed. Tell Mr Mold that you will continue chucking his rotting food shit (container and all) if left out if he continues leaving it. This may mean locking up your own plates/cutlery/cookware in your room for protection from retaliation, but it must be done to get through to this inconsiderate ass.
Let us know how it goes. Can't stand shit heads like these, and there's nothing more satisfying than putting them in their place when called for. It's likely never happened to him and long overdue for this guy. Good luck.