You're all missing one thing here. How do you even know it's only one source? It's highly likely that the main perperator started out small and some sheep followed the lost sheperd.
If the idiots doing it can mask their identity when uploading the warbots which are usually just a few KB's then the chances of them being caught are pretty slim.
If Bin Laden or the Turks were going to attack servers, I would think they'd attack more than one network. They'd also be likely to attack the whole ISP not just one provided service, that way causing more widespread damage. On that note I think terrorism can be ruled out. Being a Turk doesn't make one a terrorist anyway or even an l337 h4x0r.
