If United does decide to cancel the tickets..I believe:
-It will weed out those not too serious or educated about the DOT rulings (blog readers?)
-Those who do file DOT complaints will get their tickets honored.
Based on the wording of the DOT ruling, and my past experience with similar mistake fares and complaints (RGN was indeed quite similar), I expect those who do fight to fly, will be able to fly.
Just my opinion.
