(edit conflict) Nope, the use of flags here passes MOS:FLAG. Asia's Next Top Model is not a TV show per se, it is a modeling competition (with a similar-ish format to a pageant) within a TV show. Contestants do represent their countries, it's not just their nationality. LinguistMoi?Moi.09:29, 15 November 2016 (UTC)[reply]
(edit conflict) According to MOS:FLAG, Flag icons may be relevant in some subject areas, where the subject actually represents that country, government, or nationality – such as military units, government officials, or national sports teams. Note that it says such as; it doesn't list pageants, but flag icons are used in pageant templates, and appropriately so, and are appropriate used here as contestants do represent their countries in this contest within a television show. I don't see how the fact that AsNTM is a television show makes it an exception to this policy. LinguistMoi?Moi.09:40, 15 November 2016 (UTC)[reply]
Firstly, there is no way that an individual participating in a reality show passes the criteria where the subject actually represents that country, government, or nationality, and secondly, it's also referring to usage in articles, and not navboxes. If you keep reading the guideline, you'll see multiple reasons why it's even less acceptable here: "The name of a flag's political entity should appear adjacent to the first use of the flag, as no reader is familiar with every flag, and many flags differ only in minor details"; "placing a national flag next to something can make its nationality or location seem to be of greater significance than other things", etc, etc. --Rob Sinden (talk) 09:48, 15 November 2016 (UTC)[reply]