It's one thing to do your own thing over a country with limited military power, and it is another to do it over the likes of China, whom one would suspect has the kit and the cojones to use it against an intruder flying through military airspace, even if just avoiding weather.
They certainly seem happy enough blatently hacking all and sundry on the internet for military gain. After all, if they do end up shooting you down in error, what is the rest of the world going to do? Boycott them?