Originally Posted by
skywardhunter
Even if your notion was true, it would mean the terrorist was on the same PNR as someone who did continue flying, presumably their friend/colleague, so they'd sacrifice them?
Group reservations don't need to be people who know each other. Tour groups comprise of strangers put together. There might be families within it but not everyone will know each other so to intermingle their checked bags.
You can definitely travel as a single within a group tour, no show, and sacrifice the other strangers in your "group".