Hey Egor, article author here. How come you are not such a fan of checking referer? It cannot be a global fix (some sites depend on serving xdomain scripts, have lots of users with proxies that alter headers etc), but it should work well for many cases no?
it works of course, but to be compatible with many environments we need something more reliable than Referrer.
Sorry Egor, I thought you are pointing out an article you have published.
This is joev's article. His explanations of the issue are better than mine ;)