What happened to "innocent until proven guilty beyond a reasonable doubt"? The funds are most likely not stolen, so why refuse them?
innocent until proven - that's how the mafia operates. if you doubt the legitimate source of your business you should by moral standards put it on hold until the legitimacy is ensured.
Sure. How much evidence that Zhou did it has been posted? Now, remove all of aurumxchange's posts, posts that contain information that aurumxchange could have made up. How much evidence is left? Not even Mt. Gox has anything: they publicly could only admit half of the story was verifiable.
If one person is enough to doubt a legitimate source, I could argue that Satoshi stole the coins.