I bet a monitor of internet searches finds likly canadates for further investigation.
These people might have been caught by a cookie.
If I were involved I would publish wrong information for bomb recipies, substitute a nice dish soap recipie and let the bombers waste some time.
http://www.ledgernews.com/news/1345-august-8-2012/5413-parents-teen-charged-in-pipe-bomb-caseParents, teen charged in pipe bomb case.
..................could not disclose the source of the tip.
“That’s part of the ongoing investigation; I can’t release that information,” Merchant said, adding that a Facebook page is an avenue the department is also exploring. Investigators reportedly also have linked the juvenile to a YouTube account, which allegedly gives instructions on how to make a pipe bomb.
By noon that day, investigators had secured a search warrant and were preparing to enter the residence with members of the GBI bomb squad. The Bureau of Alcohol, Tobacco, Firearms and Explosives and the Canton Fire Department also responded.
Officials said, upon making entry, several explosive devices, as well as bomb making materials, were located.