My parents were born and raised in NE Arkansas, and my mom kept a covered jar of bacon drippings on the counter at room temperature. Both of them are in their mid-80's and still alive, but Dad did have that coronary bypass about ten years ago.....
I keep my bacon drippings in a sealed jar in the fridge. My wife insists on keeping a stick of butter in a covered butter dish on the counter, so it is easy to spread. This gives me the vapors, but we have not died yet. The stick of butter gets eaten up in about two weeks, so maybe that is too short a time to spoil.