What had Sisyphus done?

Question

to make him go to Hades and have to roll a stone up a hill for all eternity, and lose hold of it and have to start all over again? Also, what had Tantalus done to be stuck in a pool of water with a powerful thirst, and to have the water cower away whenever he tried to drink?

Answer 1

..Kassandra never to be believed?  These are all parables.

Answer 2

Sisyphus tricked Persephone into letting him out of the underworld.

Tantalus sacrificed his son to the gods, then cooked him and served him to the gods.

Yeah, they were very naughty.