This week a joint police operation in Europe took down more than 400 websites suspected of illegal activity in the Dark Net. This operation had to be run entirely in secret and had to take place in many places at once. Once one site is taken down, others are warned, and they unplug. Simultaneous takedown is the only way this sort of operation is able to be run - so said Troels Oerting, head of Europol's European cybercrime centre. This hit took down not only dark net sites, but services as well.