Darkcoin is meant to fix problems with Bitcoin, not to be CriminalCoin. I'm afraid that if you're trying to hide something from the NSA, we don't want to be involved with that.
Privacy is a human right and it's about time that a coin implemented it. However, if the NSA wants to find out what you're doing, they will. No matter how much you protect it, if someone wants your information bad enough they'll get it.
It's Especially true with Zerocash/Zerocoin and their use of exotic mathematics. I've read through it and it's insanely complicated, I wouldn't be surprised if there's a room full of cryptographers in the NSA ripping it apart already.
I do believe NSA-proofing is a virtually impossible task, since they have control on factors beyond our own code (hardware, networks) but the issue here is this: DarkSend is launched, everything rolls, it's open sourced etc etc. Then another one comes along, takes Dark Send code, implements divide & conquer and then boooom. He claims they have the superior anonymous coin. It's a market weakness for DRK placement right there if it lags behind.
Now, the situation is obviously difficult having to choose one or the other, so I propose this: What if DarkSend had 2 checkboxes, one that is simple "Enable DarkSend" and a further one which activates "Divide and Conquer" for "extra anonymity". I've been thinking about a slide bar actually that enhances the degree of anonymity, with something like 1 to 10 - and increasing parameters like time delay for transaction or laundry depth (multiple laundering) to make it more obfuscated, but maybe it could simply go the Div/Conq way at max setting for the more paranoid about their secrecy.