There is a really simple thing in FAQ:

"What can users post to Steemit?
Steem is an open platform meant to host and welcome any legal content."

Stolen stuff is not legal, and offer any illegal thing, also forbidden.
End of the story.

Crying about censorship, bah...
Those, who think, this is a censorship, just skip steemit, and use other front-end, what exist on steem blockchain.