Only reason I jumped into conclusion that it was a work of fear mongering toward the american voters because muslims, who are feared the most by americans, were originally blamed for the bomb threats. Or at the very least, it could be racial profiling at work
Here's another more recent bomb threat...I think it is hilarious this article mentioned that the dude is an israeli dual citizen.
http://msnbc.msn.com/id/15398560/from/RS.2/
Not only there has been a surge of bomb threats, there also have been numerous foilings of terror plots over the summer which later is met with heavy skepticism and doubts that they were real or even exist.