Then again, a lot of "professional" penetration testers also simply fire up their exploit scanner and then charge you big $$$ per hour. So I don't see the problem in letting a hacker group doing it for free
Lulz Security® is not part of anonymous, just like wikileaks is not part of anonymous. they are all separate entities, although they may have similar goals and ways of working. and anyone who thinks they are simply just some script kiddies, you would have to be wrong in a lot of cases, sure a lot of script kiddy anons exist, but a lot of them are also very good, like the sony hack(s).