The group gave two reasons for quitting. It's been 50 days since their group first started and the group members weren't permanently tied to the LulzSec identity.
Behind this jolly visage of rainbows and top hats, we are people. People with a preference for music, a preference for food; we have varying taste in clothes and television, we are just like you, said the group.
As such, the members moved on from their LulzSec identity.
LulzSec's disbanding coincided with increasing scrutiny from the authorities and a brewing feud with hacking group TeaMp0isoN and lone hacker The Jester. Both hacker entities had threatened to expose the personal information of LulzSec members.
Besides the Pastebin document, LulzSec left behind a Youtube video, a call to support Anonymous and carry on the ideology of Operation Anti-Security, and files of leaked data.
The leaked data include:
AOL internal data
AT&T internal data
Battlefield Heroes Beta users
Random gamin forums users
Navy website defacement
FBI website Defacement
Office networks of corporations
Private Investigator Emails