What are you talking about? You're confusing the terrorists in 24 and the movies with real life. There are no "sophistication" rules for what a terrorist uses to cause terror.
"Dear Mr Abdul,
It has come to out attention that you recently used gasoline and propane in a car bomb in New York City. You are in clear violation of rule 27.4 in the Al Queda rules of terrorism manual. Using such low tech combustibles for your bomb makes us look not only bad but also amateurish. Also because we are actually sending you this letter means that you also violated rule 44.7 and did not blow up yourself along with the bomb. Because of these violations we are terminating your membership in Al Queda. In the next couple of weeks you will receive a letter from accounting reimbursing you the prorated balance of this year's membership fee. "