Yeh I have heard of humus causing the odd gas attack but not any terrorist attacks. I prefer the one with eggplant in it though, babaganoush (spelling?).
Honestly though I think that the weak US dollar, the continued rise in cost of living and the reluctance to match that rise with salary increases by employers here, is more of a threat than any possible terrorist attacks in the future. If the current situation continues, there will be noone to fly all the new shiny aircraft, and even if there was there would be noone to make sure they don't bang into each other once they are airborne.