Wait what? So I can DoS any Web site in China by creating a rogue DNS record that points to its IP address, even under a completely unrelated domain? How would they even find those records?
Seems like a very minor speed bump in your plan, though: presumably something like https://www.chinafirewalltest.com would achieve that, or send a few emails for folks to click.
Do you incorporate post time into this model?
This is pure anecdata but I've found that certain posting times lead to more upvotes for what feel like the same type of stories.
It would be interesting to see some sort of personas-over-a-day graph.