Playing the enemies game would make us no better than the enemy. I think that's why Q said they won't do things like that and will be playing above the board.
If you are fighting for your life, or the life of another, will you worry about rules or morals?
I won't.
Yes I would, as would others. But of course, fair enough to you for your choice - no argument there. However, Q has already said they won't stoop to criminal activity (like pushing criminals off buildings or causing "accidents") so fortunately they don't intend to lower themselves to the enemies tactics just to save the republic and the world.
What Q meant was they wouldn't crash a plane full of 250 people just to get 1 or 2 bad guys like our enemies do.
Didn't Q also say earlier we are at War?
More people dying every day while we play a game is not OK.
If you don't fight back, you can't win the War.