Hello identity thefts!
I don't think it is this far yet, it could be possible, but also quite difficult to implement something like this that doesn't have large rates of backfire. I don't know whether it is even possible to draw a connection between political view point and whether somebody should be allowed to buy something. I mean, the guy could have not so nice opinions of the government, but he still could be buying something that benefits the government.
That and the fact it is difficult to prove somebody's identity in the internet. I don't know how's the China's current Great Firewall working with respect to identity, 10 years ago I had to install a program to my computer to access the internet (world wide access and probably ten Chinese following everything I did there).
Then again, never underestimate the stupidity of politicians