Fatfish, do you really feel the need to publicly seed ideas like that in the minds of the "crackpots" you cite? Go to those who are responsible directly if you have concerns rather than air them on fairly popular website, please!
However, I do wholeheartedly agree that this is not the place for such discussions.
And people who can orchestrate co-ordinated attacks on NYC, the Forces in theatre and encourager les autres to attack soft targets in the UK, Spain and India would not have spent an inordinate amount of time considering, and attacking, the softest targets already??