"I want everyone to know - we are aware of the 51% on @ghash_io We would never harm the community. Our official statement is coming soon."
So they don't consider double spending as harming the community. Strange.
Official statements from cex/ghash are "for the fishes":
Derrik Goon (CEX.IO)
Oct 31 11:24 (UTC)
Hello uk1,
I would like to inform you that this information you are reading is not accurate, we are a company that does not involve itself in any sort of online gambling, its for the fishes.
Best Regards,
Derrik G.
CEX.IO Support
Don't wait for it - just mine somewhere else.