Originally Posted by
scotneil
I disagree with nonflynomore's remarks about the passengers' luggage: airline say the family were "issuing threats" - that's why they were removed, not because of child's behaviour. The rules about unaccompanied baggage are there for a reason, and should be adhered to 100% of the time. If this family were indeed threatening the crew, that should "raise the flag" to their higher-than-usual security risk.
Also common sense may be applied as appropriate.
Threats didn't start till they were asked to disembark.
The family had all intention of flying.
Therefore during a risk assessment it must have been determined of very low threat level.
And that is how the systems is supposed to work.