there are tons of them
you can email them and ask if it was them, they will respond like they always do if it's not on their twitter/site it wasn't them
privacybox.de/lulzsec
there are patriotic clowns masquerading as hackers doing stupid shit in lulzsec name to discredit them, bitcoin and everything else. i suggest you start looking at the jester's twitter this is right up his alley to gain ops on an IRC channel then issue a bunch of threats under somebody else's name. he's also probably responsible for DDOS'ing bitcoin exchanges for uncle sam
Do you think it likely that jester is hacking bitcoiners for uncle sam?