we live in a scary world.
doing what they did with last minute booking changes that were clearly co-ordinated is bound to raise flaggs.
Yes, it's a shame we have to consider threats like this, and that normal people will sometimes get caught up in situations like this, but if you take a step back, it's easy to understand why they were viewed with suspicion.
Personally, as SLF, I want the Captain to retain the right to be able to off-load whoever he likes.