[Summary] China's economy had boomed over the past decade, and many were hungry for foreign travel after the country's decades of isolation in the last century. However, the Chinese's conduct overseas reflected poorly of China and blacklisting is the latest effort to control the tourists' behaviour abroad.
I feel that China's success today is partially because of how conscious they are in terms of the impressions they make on foreigners. The government sees the importance of citizens behaving morally when they step onto a foreign land. The citizens have to keep a watchful eye over their behaviour as it would directly affect people around them.
Acting anti-socially on public transport, damaging private or public property, disrespecting local customs, sabotaging historical exhibits or engaging in gambling or pornographic activities are examples of how one may act on a foreign land when ignorant and insensitive towards one's customs and cultures. I strongly feel that no matter where you are from, you step foot on this land, it's your responsibility to blend in with the people's ways of life, customs and culture and omit habits viewed unpleasantly by the people here. China have a foresight of how unpleasant it is when foreigners have bad impressions of them. They took action to tackle this problem is commendable. However, I believed a better solution would be 'educating' new generations on their conduct in public, rather than 'punishing' offenders when they were brought up this way since young. I hope the government would reconsider and suggest even better solutions to tackle this problem.
[Relating to Singapore context] There are any cases of students securing a scholarship and seizing this golden opportunity to study abroad. However, many had misconducted themselves, bringing much disgrace and humiliation to Singapore. Government may consider such blacklisting solutions. However, ineffectiveness comes when the blacklisted person isn't mentally affected to keep watchful of his/her behaviour as such a punishment like blacklisting isn't impactful enough.