Nonsense. One of the classic objectives of terrorism is to provoke knee-jerk reactions that erode confidence in the targeted government.
Yes, because the real goal of Al Quada wasn't to kill 3,000 people on 9/11, it was to make it annoying to go through airline security.
You actually think OBL tells his co-horts, "A few more bombings and death, and we can achieve our true goal.....making the infidels inconvenienced and unable to sneak budweiser into sporting events".
Give me a break, Death and destruction are the means to get to a policy goal..and that goal does not include me not being able to bring a ham sandwhich into a football game.