I would not be so sanguine. One of the effects of the Internet is that more and more people are finding out about this strategy. You can see that in the increasing number of enquiries here from people who have never done an ex-EU before, and who are interested in doing one even though their personal circumstances make it a dubious proposition. But you can also see that in the various reports from around the world (not just Europe) of the increasing aggression with which the industry is currently trying to deal with the problem. Even within Europe, many here will remember the reports that BA was changing its view about dropped last sectors. Hidden city ticketing is not a new problem, but the current interest in enforcement is a change. And as has frequently been said, so long as airlines aren't losing much money from a few people pulling tricks at the margins, they'll be frying their bigger fish - but if they start losing bigger money ...