A rival hacker group is working on exposing the identities of LulzSec members, following a spat over, amongst other things, the artistic and technical merits of their respective attacks.
TeaMp0isoN is believed to be connected to the pro-Palestinian Mujahideen Hacking Unit and to be responsible for a Facebook hack in December in which 15,000 pages were taken down.
But one member's taken exception to dismissive comments from LulzSec about his age - apparently, he's just 17. In response, he mocks LulzSec for using pre-existing tools and scripts to grab databases, and says he's going to release information on the group.
"TeaMp0isoN Issue 2 is coming out VERY soon exposing lulzsec members (pictures, addresses, passwords, ips, phone numbers etc.... not so anonymous anymore are you? lets hope that you can swim because the lulzboat just got titanic'd," he says.
The group describes itself firmly as blackhat, and says it's not associated with the FBI in any way.
"We didnt do this because lulzsec hack other people, we did this because lulzsec/anon are scene fags running around thinking they are ug," says the group on its Twitter feed.
"Were just fed up of people thinking anon/lulzsec are hackers when clearly they are just DDoSers and SQLi skids."
While some news media have reported that TeaMp0isoN is based in the Netherlands, the group's firmly denied this.
"no idea why people think we are dutch :L - 2 of us are from UK - and 1 is from USA - thats all ul ever know," it says.