For those who do not know LulzSec, they recently gained fame by hacking PBS website. They posted Tupac Shakur was alive in New Zealand On PBS news page.
PBS came under fire when they aired a show about wikileaks.
In a statement released by LulzSec
Read the full story about the PBS attack here:
They have now according to twitter set their sites on Sony! Not only that, but have attacked and Sony has yet to notice or respond to it. In light of the recent PBS attacks being real as mentioned above, also the fact Sony seems to be trying to upgrade security. It should probably be taken as serious.