Lets play the game again.  If some one/organization wanted to destroy bitcoin, how could they do it and how can we protect against it?  I'll kick it off.  Whats *really* protecting Bitcoin from a 51% attacker?  Yes the big hashrate, but according to the stats all this hash is coming from a few miner pools. 

Couldn't someone just DDoS them --> 51% Attack --> ?? --> Profit!