It's hardly surprising that these people are being caught. Using a VPN service that resides primarily in the USA, the same jurisdiction in which your attacks are being carried out, seems a bit shortsighted.
It would be great if they would go to trial so that maybe we could find out how the FBI tracked them down. My suspicion is that it's all an abuse of spying laws intended for terrorism. Unfortunately these guys will probably all plead.
Arrest these evil-doers, copying information and defacing images.<p>In other news, why is the FBI suffering from such a shortage of willing hackers? More hypocrisy after the break.