Happy Feminist has an interesting post about accents up. One of the commenters writes about the commenter's father leaving rural Georgia to get and education, changing his own accent and trying to show everyone how to talk.
While it's not something I would do, I can for Henry Higgins reasons understand why a father might want to teach his kids to talk like a New Englander rather than a southerner.
When my dad was a kid, he did the opposite, though. The ChaliceDad was a child prodigy opera singer. (You've heard of Amal and the Night Visitors? The ChaliceDad was Amal in a major ciy's production.) However, my dad was growing up in Texas and when he got into Interlochen in Michigan, he knew that no matter what, the other kids would hear his accent and think he was a hick.
So he decided to lay it on really thick. He bought himself some boots and a cowboy hat and made his accent even heavier before going. He was determined to be "that cowboy kid from Texas" and to hear my aunt tell the story, the sheer oddness of that at a snobby boarding school in Michigan made for a quick introduction to the campus and my Dad became very well-liked.
George W. Bush apparently did the same thing at his high school and my more liberal pals have been known to hold this up as an example of the man's phoniness. But in both my father and the president, laying the Texas on thick strikes me as the act of savvy young men who made the best of what must have felt like a bad situation. Would that I would have had the other kids so figured out in high school.
Added later: The Salon story about a man who saw an article on the Onion and wrote a blog post about it not realizing it was a joke, and is now claiming that this happened because he was raised in Germany and Germans have no sense of irony, is sort of a related issue.