Dark Web Sites and the US Department of Justice Despite its obscurity, the dark web offers a wealth of information. From black markets for drugs and weapons to message boards, the underground network can provide information on a wide variety of topics. It's not all bad though, as the dark web can also be a place to uncover corruption. For example, the US Department of Justice might want to shut down a marijuana market in the Netherlands. They may need to work with other government agencies in order to accomplish the task.