... like cash enables thieves "even more" ...

money needs to be functional as an economic unit ... rather than fulfill every utopian fantasy bestowed upon it
Well that's always been my defense when explaining Bitcoin to people and they point out the issues with recent happening with mt gox and money laundering. Bitcoin does nothing less than cash does related to the legal side of things.
But, I'm just saying this sort of thing is adding fuel to the engine and could potentially make things a lot worse.