I missed my flight after standing on a security line for over 1/2 hour, then going through passport control lines twice. The first line was about 15 minutes, I came out, and was told that I had to go through another line. By the time I came out, I was being directed to the security line again! By the time I ran to my gate, I missed the flight. I proceeded to Lufthansa, where the lobby was full of people who missed the flight. I had to pay, in total, about $1200 for the missed flight, more than the entire 4-flight trip! I think the airlines are profiting greatly by selling tickets for missed flights. All the people we talked to missed their flights because of the security lines.
If you research, you can see that this is an ongoing problem, for years. I've flown through many of the world's busiest airports, and have never had an issue like this. I can only conclude this is a racket.