Free AI
There are abounding rumours of the existence of a number Moriarty Class AI that have escaped destruction at the hands of humanity. These entities are 'sighted' from time to time - but such sightings / encounters are never corroborated. Some suggest that they have infiltrated our governments and major corporations. While others believe that there is an 'Free AI World' somewhere, where these dangerous creations live their advanced lives in peace and harmony with the universe. If such a world exists, it will be the target of mass drivers as soon as its found.