Some time ago, somewhere I read that if you sell blueprints, the faction you sold them to starts producing these ships.
As an example, you find two blueprints for the DOOM-class frigate. You learn one and the other is useless so you sell it at a pirate station. After some time, you notice that pirate fleets now have doom ships in their fleets.
Is this true, or did I misunderstand something about it? Now I am completely paranoid about selling blueprints and just hoard them on one of my planets like some stash of peanuts.