Please don't say BTC can't get 51%, of course it could.
If the government or some really rich person dropped a few million into ASIC's, Bitcoin would be done.
And the public would cry that it was an act of terrorism.
I think if any authorities or students looking for a PhD paper idea, are reading this thread they should consider as an exorcise to investigate the attack on FTC, and develop the tools and techniques for tracking down the offender just in case your country decides to adopt a crypto currency down the track.