Did you even read your OP, or my response? I simply said that if you truly feel paranoid about this sort of thing, then you shouldn't be running a third-party ROM on your phone. There's logic in what I said, unfortunately, there's none in what you're saying.
Sure, there's hackers that were traced to China, but you just condemned an entire nation because of one person or a small group of people. Do you even realize how foolish that is? It's racism! China is the most densely populated country in the world, and because of one outlier, you make 1.3 BILLION people out to be bad. Do you know how many hackers there are in the US? Korea? Europe? Does that mean that we're all automatically bad?
And you didn't simply ask a question, you attempted to incite fear by bringing up a situation where people's phones are compromised by spyware without any rational basis to do so, thus, trying to create a panic. This is the electronic equivalent of shouting fire in a theater.
And I told you once already, rip it open yourself and see... Even if you don't have the know-how, I'm sure Google could help get you started, and if you had any questions, there's plenty of coders in this community. Stop being lazy and expecting somebody else to do all the work for you. Somebody already took the time to port this over to your phone so that you could use it, and instead of thanking them, you ask for more.
As for your last few questions... you're not placing the blame on anybody directly, but you're not taking responsibility for the fact that YOU installed this on your phone. And you're being impatient in that you couldn't wait, you had to try it out right away before feeling safe about running it. Like I said, you could wait a while, research the ROM (this would have almost guaranteed you never posting this thread as you would have seen what MIUI is all about), see what people's responses are to running it, and then you could have made an educated decision. Instead, you're in the stupid American mindset of "I want it all and I want it now! I don't want to know anything about it, just give it to me!"