Agreement with DannyM. Bitcoin should not be centered around criminal usage. Not only will it hamper Bitcoin's usage for legitimate usage, it will also harm Bitcoin's image (thus killing its potential to spread). Focusing Bitcoin on illegal uses is short sighted.
While I certainly do not wish to make a ethical judgment on "less-than-legal" activities, I would like to register my opposition to a plan to explicitly "cater to that crowd", for at least strategic reasons.
1. how does bitcoins illegitimate application hamper its use in legitimate application, last I checked most criminal transactions are made in current fiat currencies, and yet they still seem usable in legitimate functions today...
2. Claiming that an exchanger should cater to where they are most likely needed is not focusing on criminal activity, it is making good business decisions...
3. You guys are judging