It is bullshit.
http://www.foxnews.com/story/0,2933,519570,00.html
Quote:
Annette Lundeby admitted to Wired News that she knew Ashton had been making "really funny" prank calls, and that he'd made bomb threats, and that he'd received money for some of the calls — but she said it was all just a joke.
An Australian college student who told Wired News that he tipped off the FBI about Ashton said Annette Lundeby knew exactly what her son was doing.
"His mother knew that he was making calls, because she'd come on the microphone when he was talking and tell him not to do any bomb threats because the house was going to get raided," the student told Wired News.