Regarding booking the fare in DKK, I'd think the main issue is how it plays with the DOT or a judge, not how it plays with a more sophisticated FT audience.
An argument from UA that the fare shouldn't be honored because those booking knew it was too low to be legitimate and were playing games by booking in DKK (obviously this does not apply to all) and these are not the sort of people the rules were meant to protect could sound appealing to someone who otherwise favors corporations over individual plaintiffs or who is not very familiar with booking airline tickets online.
The DOT is certainly concerned that "individuals are purchasing these tickets in bad faith and not on the mistaken belief that a good deal is now available".
http://www.flyertalk.com/forum/24377477-post4481.html It's just not clear what they'll do about the concern.