However, if Chaos has that kind of pervasiveness it cannot also be an irresistible memetic attack where they can put up some evil graffiti and suddenly an entire city turns. Which, really, is necessary for 40k to work at all. If basic Chaos insignia were a basilisk attack, they'd roll up a majority of the Imperium by accident in a year.
Tbf, symbols related to Chaos
are memetic attacks. But most often just minor ones that can be staved off with sufficient willpower and/or faith. Probably requires some serious warp-juice and/or dedicated attention from an actual daemon(s) backing them up to be truly dangerous, unless you are subjected to them again and again.
However, while it is true that even a
tiny bit of corruption or knowledge about Chaos can easily lead you into a path of falling totally into chaos... But this is much more likely to happen in the Imperium. Because
any alternative to you horrible, miserable life can seem like a good deal. Why would you resist, when worshipping a distant God-Emperor has only brought you suffering without any tangible rewards in your life? Not necessarily an instant basilisk hack that spreads everywhere in a Hive City, but still damn dangerous.
Or maybe you are some corrupt noble who is bored, so you think you are above the law and consequences. And so blindly wander into true damnation after you get the first hint of it. Maybe, possibly, you know this and don't even care.
Anyway, Imperium is horrible even at fighting its sworn archenemy, who sees it more as an endlessly giving cornucopia of desperation, madness, corruption and so on, news at 11.
@Neablis, did the Navigator Station include any Navigator Lore? Because they need training too, so it may be an issue having to reinvent the wheel once we decant the kid.
IIRC, they took their records with them, then wiped or otherwise destroyed the rest of the data on the station. I think we got some star maps from the station, but that is about it.