Sudden outbreak of common sense proves contagious?
Best put 'er in quarantine right quick then. And that BA chap too.
It's not so much an arms race, as the "arms" on one side are essentially immaterial and on the other side just that much extremely boring job opportunities to man overly expensive kit and have excuses to harass people. The people our beloved overlords are trying to protect are caught squarely in the middle.
Where the military-industrial complex had actual weapons to counter and counters to defeat, the security-circus complex is matching show move for show move. Who can scare our citizens the most? You? No no no! Me! Watch this! Ha, you ain't seen nothin' yet, watch this! Ad nauseam.
Not to mention that financially it's trying to defeat an adversary with a shoe-string budget by trying to ruin the treasury. Somehow that seems a bit skewed.
How long did it take us to realise that? Nevermind, don't answer that. If we could trust our security services to take out the threat before it became actually dangerous, in the case of airlines well before it reached the airport, then they needn't campaign to scare us about what might happen. We know lots of stuff might happen, and we can do even less about it. Who's the intelligence service here then, hm?