Well the good news is it not "hacks" to networks rather just disruption of servuce attacks. The fact they went after 5 major companies and made an official claim of a bomb threat now has prompted nsa and fbi to investigate. Many say they can consider it a terroist attack wether it just a prank or not. Having said that does explain why fbi is rather quite about these attacks and so called threats. If they are just trolling they may have made a rather flawed descision to taunt the fbi and nsa.