How do I know what fares are obviously mistakes? Fare prices are all over the place. They quite often charge less for a round-trip than a one-way to the same destination, which is not a mistake at all, that fact makes it clear that it's not obvious which fares are mistakes and which aren't, or I'd think all of those were!
Yet he completed the trip. How hard would it be for the airlines to code something that says if price/mile is less than $x.xx, do not post, do not complete transaction, alert development team. And yet they haven't and this continues to happen.
Companies do all sorts of bizarro price offers. Megabus offers $1 fares to encourage pre-booking. Target sells $6 shampoo for 90% off when it sits for awhile. $1.86 may be preferable to an empty chair for some reason.
Pretending to be in Denmark to score a deal is acting in bad faith... But if you offer something for sale at a bad price, that's your problem.
