Even if the police did arrest a member of LulzSec, none of the other members of LulzSec are going to admit this until they have no choice (assuming that they ar

Even if the police did arrest a member of LulzSec, none of the other members of LulzSec are going to admit this until they have no choice (assuming that they are fairly intelligent and not going to throw him away out of spite, which would be somewhat dangerous unless they are certain that he doesn't know the identities of any of the other members). It is in their interest to be surrounded by as much mystery as possibly, if they admit that the person was a member than prosecuting him becomes somewhat easier (as the prosecution wouldn't have to demonstrate that he is who they claim he is), and - true or not - the suspicion that they were able to misdirect or fool the police makes them seem more dangerous, and may make officials more cautious about future arrests.