In all fairness, fear of bombing is not unique to jws. Also, I seriously doubt the police would bring in a bomb squad just because jws requested it. If it wasn't warranted, they wouldn't have done it. Adding to the concern was likely the fact that it was found near an auditorium.
We just had someone find a paper bag on the roadside, and our police detonated it. Turned out to be full of clothes. This stuff happens every day in our post-911 world. Better safe than sorry.