Well, I think definitely it is not just the noise issue. Sometimes there are too many outsiders coming and going in the community. Also, you see, China has a lot of high-rises being built right now, and in the cities they have what they call secure villages. So basically that is what they will see.
Also, of course, in some places they do what you would call confrontational evangelism. That sometimes does some real damage.
Of course those are not the only issues.