I think a possible reason they're overwhelmingly positive is because the FBI has a pretty good cache of bc.
The FBI budget iirc is ~8 billion, if they get everything from silk road it could be over 10% of their budget.
[1]FBI struggles to seize 600,000 Bitcoins from alleged Silk Road founder by Alex Hern http://www.theguardian.com/technology/2013/oct/07/fbi-bitcoi...
[2]Bitcoin hits $750, up 107% in a week By: John Phillips http://www.cnbc.com/id/101205416