Aviation Week and Space Technology reports:
Estimates from the Association of European Airlines indicate that no-shows cost airlines an average of 1.6% of their total revenue. The problem in the U.S. is more severe.

The Integrity system looks for bookings that are not ticketed, duplicates, fake names, redundant or incomplete itineraries and other aspects. It recommends a course of action and follow-up to clarify issues. Finnair began using the system ...
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Occasionally, all ff miss a flight and this may look like a throwaway ticket. Read on...
"Name-matching capabilities have advanced considerably with the recent addition of the European watch list developed under the international agreement signed in Schengen, the Netherlands, Arinbjarnarson said. That list contains "millions of names" of those designated by European nations as those who should be detained or who should be denied entry. These involve criminals, terrorists and others who are regarded as persona non grata..."
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*****I know someone who left France without paying the electric bill because the company wouldn't send a final bill on time. Is France such a police state that he will be detained upon re-entry into France? This is a serious question, unlike the ff question earlier in this post.