Conversation so far:
Who has to push the rock up the hill
Sisyphus, king of Ephyra, was punished to roll an immense boulder up a hill only for it to roll down when close to the top, repeating this action for eternity.
Why was Sisyphus punished to push the rock up the hill
Sisyphus was punished for his self-aggrandizing craftiness and deceitfulness.
What person chose Sisyphus's punishment of pushing the rock up the hill
Zeus made King Sisyphus roll a huge boulder endlessly up a steep hill.
Why did Zeus decide on Sisyphus's punishment
Sisyphus killed travellers and guests, a violation of xenia, which fell under Zeus's domain.

Question: what other bad things did he do
Self-contained rewrite: what other bad things did Sisyphus do, besides kill travellers and guests