While I Mirikon hasn't convinced me that Dragons are behind this... the logic behind the argument is sound. Dragons could be the instigators of the nanotech virus for a wide range of reasons. Heck, if we have a mad e-ghost dragon out there, anything could be possible. They run megacorps and are, at least stat wise, fricken geniuses at a level humans can never reach.
Still, my instinct says that this time round its not Dragons. The scaled ancients have had enough time in the spot light for the moment and they need a short break, its time to either bring back a popular older enemy or create a new threat. Thats not in-unverse logic, thats fanboy logic.
... that said, I do like the idea of an insane e-ghost dragon!
You know, it could be the bugs. Ares tech combined with the need to make the flesh herds all placid and less nukey.