Is that border an international thing? Does Russia have a 200 mile ADIZ, too? My comments are about whether or not there’s hypocrisy.
According to wiki: About 20 countries and regions now have such zones including Canada, India, Japan, Pakistan, Norway and the United Kingdom, People's Republic of China, South Korea, Taiwan, United States, Sweden, Iceland and more. Russia and North Korea have unofficial ADIZs as well. Usually such zones only cover undisputed territory, do not apply to foreign aircraft not intending to enter territorial airspace, and do not overlap.