They might've opened the devil's gate and let a bunch of demons out. And Dean might've broken the first seal and Sam might've broken the last seal. But no one could pin the blame of the whole damn apocalypse on them, could they? At least they'd cleaned up their mess - well, sort of. Well okay, the world had gone to shit and that was mostly on them - but the world was still standing at least...
"We could always become hermits and live in a cave..." Sam murmured, half joking. He started to remove his shirt as he moved to the bathroom.