It doesn't fit the article's thesis.
I think that it makes coastal city folk uncomfortable to talk about and celebrate KotH because satirizing urban Texan values, beliefs, and practices is self-seen as aggrandizing city-slicker behavior.
And I don't think cities necessarily corrupt people somehow. Obviously Garland itself is part of the DFW metroplex! It's probably more that people with a certain brand of cosmopolitan ethnocentrism end up in (or stay in) coastal cities.
http://www.npr.org/templates/transcript/transcript.php?story...