I am a case in point.

I was born in HK. The family immigrated to Canada when I was 12. I was issued a UK passport instead of a HK passport. When I became a Canadian Citizen I obtain also a Canadian passport. I also acquired a HK-SAR passport by birth. My Canadian Passport has a paid for PRC Visa even though I do no need one to enter PRC with my HK-SAR passport.

With all these passport one has to know and keep up to date the rights, obligation and issues with each passport entering and visiting each country AND CHOOSE THE PASSPORTS WISELY. What happened in the incidents posted is not an one off occurrence but a enforce policy of countries.

If you think that is a can of worms, my brother married a girl who is Malaysia national. I refuse to cross any border with them anywhere in Asia.