This fic has given me an interesting Story Idea:
Perhaps the Fog Fleet were created specifically to combat the Entities? This could be the reason all Entities have the instincts to obliterate recognizable AI. Only problem, while they destroyed the Fog's original creators, it wasn't before they sent a LARGE selection of 'Seed AI' in all directions. This isn't counting the fact the Entities also went and took the information from their war against the Fog Creators and have adapted it's use (AI Tinkers ho!).
The Seed AI have three primary 'directives'. 1: Locate new species, and infiltrate. This is done to both increase knowledge base, and to be in a position to resume the War when an Entity shows itself (while the Creators were destroyed, the Entities lost more then one of their Kin in the war it took). 2. Protect and aid the species they find. Note: this need not mean peaceful co-existence, as warfare can trim the 'fat' off a race, making them stronger. As long as the Species survives in SOME form, this directive can be considered met. 3. Eliminate the Enemy. This includes destruction of Entities, or direct consumption of said Entity or minions there-of (Parahumans).
I can just imagine the kinds of things this Idea might lead to, hence me de-lurking. Information Delivered, I now resume my normal operational Lurking in the depths of the Internet.