don't put too much faith in things you read online (not just bitcointalk). people say all kinds of crazy stuff that sometimes don't even make sense. sometimes they are simply confused and misinformed or sometimes they are spreading lies on purpose.
services such as Hashnet have an expiration date in any case. they can not function forever. at some point they have to stop working. the China FUD can just be an excuse for them to close down shop and go away. if they do it today they will do it tomorrow!
I was expecting to have seen some statement from the management of Hashnet in other to calm their investors from panicking whether the news is true or its just a rumor. Even if its true, they should have made a statement as to whether they are planning to move overseas or they are shutting down or maybe the clamp down does not affect them since they are into mining. A silence at this time in my opinion, is not golden.