few years ago i joined some guys fishing at a cabin up north annually, every June. I told one guy, the 'cook', that if he was making bacon for breakfast, save the bacon grease because I had a need for it preparing dinner. i went down to the kitchen the next morning and it stunk to high heaven. Sure enough, he had a container of bacon grease in a container for me, brown and badly scorched, would taste as bad as it smelled.
i politely declined to use it saying it was scorched, but he coudn't understand why not. stuff was nasty