"For one thing, the system has no fast-flux network or other decentralized command-and-control features, so it would be relatively easy for someone to take it down."

Or possibly easy to take it over and control an established network where the idealists believe they are attacking their enemies but end up attacking PartyPoker (again).

Yeah, if I were that way inclined I'd wait a bit and even maybe encourage its use amongst those eager to topple the West before using it for my own evil ends.