When taunting Elias (a devout Christian) over his love of the Transformers, Randall refers to The Devil as "The Fallen". In Transformers mythos, The Fallen is as close to a Judas analogue you can get (Unicron being The Devil). The Fallen is even perpetually on fire.
Randal might have left the coffee pot on in a subconscious desire to help Dante change his life around for the better.
