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
The danger lies in the authorities perceiving it as a medium for criminal activity, especially significant amounts of criminal activity. It is one surefire way of getting bitcoins and its exchangers persecuted by the law and exchangers potentially prosecuted. Even suggesting it, can be enough for conspiracy charges especially if the government has it in for the system or its exchangers and users.
Good business decisions money wise, often involve illegal activities. This can be seen regularly in the news. However good business practices such as staying out of jail and staying in operation especially long term require following legalities.